CN111978686A - Regenerated polyester material and preparation method thereof - Google Patents

Regenerated polyester material and preparation method thereof Download PDF

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Publication number
CN111978686A
CN111978686A CN202010861659.1A CN202010861659A CN111978686A CN 111978686 A CN111978686 A CN 111978686A CN 202010861659 A CN202010861659 A CN 202010861659A CN 111978686 A CN111978686 A CN 111978686A
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parts
waste
polyester material
polyester
mass
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CN111978686B (en
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徐常威
屈俊任
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Guangzhou University
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Guangzhou University
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/91—Polymers modified by chemical after-treatment
    • C08G63/914—Polymers modified by chemical after-treatment derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/916—Dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
    • C08G64/42—Chemical after-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
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    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/13—Phenols; Phenolates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/13—Phenols; Phenolates
    • C08K5/132—Phenols containing keto groups, e.g. benzophenones
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
    • C08K5/3472—Five-membered rings
    • C08K5/3475—Five-membered rings condensed with carbocyclic rings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
    • C08K5/37—Thiols
    • C08K5/372—Sulfides, e.g. R-(S)x-R'
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08K5/00—Use of organic ingredients
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    • C08K5/5399—Phosphorus bound to nitrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/08—Oxygen-containing compounds
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    • C08K7/00—Use of ingredients characterised by shape
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    • C08K7/14—Glass
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    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
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    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
    • C08K7/26—Silicon- containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/20—Recycled plastic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Abstract

The invention discloses a regenerated polyester material and a preparation method thereof. The regenerated polyester material comprises waste polyester, inorganic filler, glass fiber, a chain extender, a deodorant, a dispersant, an antioxidant, an ultraviolet absorbent and a heat stabilizer. The preparation method of the recycled polyester material comprises the following steps: 1) preparing waste polyester particles; 2) uniformly mixing waste polyester particles, inorganic filler, glass fiber, a chain extender, a deodorant and a dispersing agent, and then extruding and granulating to obtain a reclaimed material; 3) and uniformly mixing the reclaimed material, the antioxidant, the ultraviolet absorbent and the heat stabilizer, and then extruding and granulating to obtain the reclaimed polyester material. The regenerated polyester material has the advantages of high tensile strength, high bending strength, high elongation at break, good ageing resistance, good processability and simple regeneration preparation process, can be used as an injection molding raw material of products such as helmets, home appliance shells, building boards, toys and the like, and does not need to add new resin.

Description

Regenerated polyester material and preparation method thereof
Technical Field
The invention relates to the technical field of recycled materials, in particular to a recycled polyester material and a preparation method thereof.
Background
The plastic has the advantages of light weight, stable chemical property, easy processing, low cost and the like, and is widely applied in various fields. However, when the plastic is discarded, it becomes a solid waste which is difficult to degrade. At present, the proportion of plastics in municipal solid waste reaches 15% -20%, and a considerable part of the plastics is polyester products, such as polyester fibers, polyester films, polyester plastic products and the like. The traditional treatment method of the waste polyester products is generally incineration or partial recycling, the recycling rate is low, and under the background, the waste polyester products are converted into the regenerated polyester, so that a new way for treating polyester solid wastes is provided.
In the long-term use or waste process of waste polyester products, the waste polyester products are easily affected by factors such as external force, heat, light, oxygen and the like to age, the polyester can be subjected to chemical bond breakage, thermal degradation of a polymer chain and group shedding, the molecular weight can be reduced, the physical properties can be deteriorated, such as hardness, stickiness, brittleness, color change, strength loss and the like, and certain peculiar smell can be generated, and the change can affect the recycling of the waste polyester. The existing polyester recycling method is generally simple in recycling, and the obtained regenerated polyester has poor performance, small application range and low utilization value.
Therefore, it is required to develop a recycled polyester material having excellent properties and a recycling method of waste polyester.
Disclosure of Invention
The invention aims to provide a recycled polyester material.
The invention also aims to provide a preparation method of the recycled polyester material.
The technical scheme adopted by the invention is as follows:
a recycled polyester material comprises the following components in parts by mass:
waste polyester: 70-100 parts;
inorganic filler: 5-20 parts of a solvent;
glass fiber: 1-5 parts;
chain extender: 3-15 parts;
odor removing agent: 3-15 parts;
dispersing agent: 1-5 parts;
antioxidant: 0.5-2 parts;
ultraviolet absorber: 0.5-2 parts;
thermal stabilizer: 1-3 parts.
Preferably, the recycled polyester material comprises the following components in parts by mass:
waste polyester: 70-100 parts;
inorganic filler: 8-15 parts;
glass fiber: 2-4 parts;
chain extender: 4-10 parts;
odor removing agent: 6-12 parts of a solvent;
dispersing agent: 2-4 parts;
antioxidant: 0.5-1.5 parts;
ultraviolet absorber: 0.5-1.5 parts;
thermal stabilizer: 1-2.5 parts.
Preferably, the waste polyester is at least one of waste polycarbonate, waste polyethylene terephthalate and waste polybutylene terephthalate.
Further preferably, the waste polyester is waste polyethylene terephthalate.
Preferably, the inorganic filler is at least one of calcium carbonate, talcum powder, tetrapod-like zinc oxide whiskers and silicon dioxide.
Further preferably, the inorganic filler is talc.
Preferably, the particle size of the inorganic filler is 3-15 μm.
Preferably, the chain extender is at least one of phthalic anhydride, 1,4,5, 8-naphthalene tetracarboxylic anhydride, pyromellitic dianhydride, terephthaloyl biscaprolactam, 1, 4-butanediol diglycidyl ether, ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, resorcinol diglycidyl ether, glycerol and triphenyl phosphite.
Further preferably, the chain extender is ethylene glycol diglycidyl ether.
Preferably, the deodorant is at least one of fine-pore silica gel, porous alumina, zinc oxide, activated carbon, magnesium silicate, diatomite and zeolite molecular sieve.
Further preferably, the deodorant is porous alumina.
Preferably, the grain size of the smell removing agent is 2-8 mu m.
Preferably, the dispersing agent is at least one of sodium lauryl sulfate, polyethylene glycol, polyethylene wax, lecithin, sucrose ester, alkyl glucoside, dioctyl sodium sulfosuccinate and sodium glycocholate.
Further preferably, the dispersing agent is dioctyl sodium dibutylsulfate.
Preferably, the antioxidant is at least one of ascorbic acid, dilauryl thiodipropionate, butyl hydroxy anisole, hydroquinone, p-tert-butyl catechol, di-tert-butyl p-cresol, N-diphenyl-p-phenylenediamine and dialkyl diphenylamine.
Further preferably, the antioxidant is di-tert-butyl-p-cresol.
Preferably, the ultraviolet absorber is at least one of 2, 4-dihydroxybenzophenone, phenyl o-hydroxybenzoate, 2-hydroxy-4-methoxybenzophenone, 2- (2' -hydroxy-3 ',5' -di-tert-butylphenyl) -benzotriazole, 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine, and hexamethylphosphoric triamide.
More preferably, the ultraviolet absorber is phenyl ortho-hydroxybenzoate.
Preferably, the heat stabilizer is at least one of magnesium stearate, zinc stearate, calcium stearate and barium stearate.
Further preferably, the heat stabilizer is zinc stearate.
The preparation method of the recycled polyester material comprises the following steps:
1) crushing, deoiling, cleaning and drying the waste polyester product to obtain waste polyester particles;
2) mixing and stirring the waste polyester particles, the inorganic filler, the glass fiber, the chain extender, the deodorant and the dispersing agent uniformly, adding the mixture into a double-screw extruder, and extruding and granulating to obtain a reclaimed material;
3) and mixing and stirring the reclaimed material, the antioxidant, the ultraviolet absorbent and the heat stabilizer uniformly, adding the mixture into a double-screw extruder, and extruding and granulating to obtain the reclaimed polyester material.
Preferably, the particle size of the waste polyester particles in the step 1) is 1-5 mm.
Preferably, the rotating speed of the stirrer in the step 2) is 500-800 r/min, and the stirring time is 5-15 min.
Preferably, the processing temperature of the double-screw extruder in the step 2) is 225-265 ℃, and the screw rotating speed is 35-70 r/min.
Further preferably, the processing temperature of the double-screw extruder in the step 2) is 225-265 ℃, and the screw rotating speed is 40-65 r/min.
Preferably, the rotating speed of the stirrer in the step 3) is 500-800 r/min, and the stirring time is 5-15 min.
Preferably, the processing temperature of the double-screw extruder in the step 3) is 215-255 ℃, and the screw rotating speed is 50-90 r/min.
Further preferably, the processing temperature of the double-screw extruder in the step 3) is 215-255 ℃, and the screw rotating speed is 55-80 r/min.
The invention has the beneficial effects that: the regenerated polyester material has the advantages of high tensile strength, high bending strength, high elongation at break, good ageing resistance, good processability and simple regeneration preparation process, can be used as an injection molding raw material of products such as helmets, home appliance shells, building boards, toys and the like, and does not need to add new resin.
Specifically, the method comprises the following steps:
1) according to the invention, the polymer chain length of the waste polyester is increased by adding the chain extender, so that the physical property and the mechanical property of the waste polyester can be improved, the problems of small molecular weight and reduced physical property of the regenerated polyester are solved, the waste polyester and the additives are extruded by a secondary extrusion method, the full progress of chain extension reaction and the dispersion of inorganic additives are further promoted, and the antioxidant, the ultraviolet absorbent and the heat stabilizer are added in the secondary extrusion, so that the massive pyrolysis of organic additives can be prevented, and the anti-aging effect of the regenerated polyester material is ensured;
2) the anti-aging performance of the regenerated polyester material is improved by adding the ultraviolet absorbent and the heat stabilizer, the regenerated polyester material is not easy to degrade under the influence of heat, light and oxygen in the using process, the problem of poor anti-aging performance of the regenerated polyester material is solved, the service life of the regenerated polyester material and the product thereof is prolonged, and the added stearate heat stabilizer can also be used as a dispersing agent of other additives and a slipping agent of the regenerated polyester material, so that the processability of the regenerated polyester material can be improved;
3) according to the invention, the odor of the waste polyester is eliminated by adding the odor removing agent, the problem that the regenerated polyester material has odor is solved, the produced product is more comfortable to use, and the odor removing agent and the inorganic filler are uniformly dispersed in the regenerated polyester material under the combined action of the dispersing agent and the stearate heat stabilizer, so that the odor removing agent can be used as a framework of the regenerated polyester material, can play a role in enhancing the physical property and the mechanical property of the regenerated polyester material, has a certain reinforcing and toughening effect, and further improves the processability and the service performance of the regenerated polyester material;
4) the invention adopts the recycled waste polyester to produce the regenerated polyester material, does not need to additionally add raw material resin, realizes the regeneration of waste polyester plastics, provides a new solution for the treatment of the waste polyester, is beneficial to recycling the waste polyester plastics, saves resources and protects the ecological environment.
Detailed Description
The invention will be further explained and illustrated with reference to specific examples.
Example 1:
a preparation method of a recycled polyethylene terephthalate material comprises the following steps:
1) crushing the waste polyethylene terephthalate product into particles with the particle size of 1-5 mm, and then removing oil, cleaning and drying to obtain waste polyethylene terephthalate particles;
2) adding 82 parts by mass of waste polyethylene terephthalate particles, 8 parts by mass of silicon dioxide with the particle size of 3-15 mu m, 2 parts by mass of glass fiber, 14 parts by mass of phthalic anhydride, 7 parts by mass of porous aluminum oxide with the particle size of 2-8 mu m and 3 parts by mass of polyethylene wax into a high-speed stirrer, adjusting the rotating speed of the stirrer to 600r/min, stirring for 8min, transferring the material into a double-screw extruder, adjusting the processing temperature of the double-screw extruder to 245-260 ℃, adjusting the rotating speed of the screw to 45-50 r/min, and extruding and granulating to obtain a reclaimed material;
3) adding the reclaimed material, 1 part by mass of di-tert-butyl-p-cresol, 1 part by mass of 2, 4-dihydroxy benzophenone and 3 parts by mass of magnesium stearate into a high-speed stirrer, adjusting the rotating speed of the stirrer to 500r/min, stirring for 10min, transferring the material into a double-screw extruder, adjusting the processing temperature of the double-screw extruder to 238-250 ℃, adjusting the rotating speed of a screw to 60-65 r/min, and extruding and granulating to obtain the regenerated polyethylene terephthalate material.
Example 2:
a preparation method of a recycled polycarbonate material comprises the following steps:
1) crushing waste polycarbonate products into particles with the particle size of 1-5 mm, and then removing oil, cleaning and drying to obtain waste polycarbonate particles;
2) adding 90 parts by mass of waste polycarbonate particles, 8 parts by mass of talcum powder with the particle size of 3-15 mu m, 3 parts by mass of glass fiber, 12 parts by mass of ethylene glycol diglycidyl ether, 11 parts by mass of pore silica gel with the particle size of 2-8 mu m and 2 parts by mass of dioctyl sodium sulfosuccinate into a high-speed stirrer, adjusting the rotating speed of the stirrer to 500r/min, stirring for 10min, transferring the material into a double-screw extruder, adjusting the processing temperature of the double-screw extruder to 225-230 ℃, adjusting the rotating speed of a screw to 40-45 r/min, and extruding and granulating to obtain a reclaimed material;
3) adding the regenerated material, 0.5 part by mass of di-tert-butyl-p-cresol, 1.5 parts by mass of 2, 4-dihydroxy benzophenone and 2 parts by mass of zinc stearate into a high-speed stirrer, adjusting the rotating speed of the stirrer to 600r/min, stirring for 15min, transferring the material into a double-screw extruder, adjusting the processing temperature of the double-screw extruder to 215-225 ℃, adjusting the rotating speed of a screw to 55-60 r/min, and extruding and granulating to obtain the regenerated polycarbonate material.
Example 3:
a preparation method of a regenerated polybutylene terephthalate material comprises the following steps:
1) crushing waste polybutylene terephthalate products into particles with the particle size of 1-5 mm, and then removing oil, cleaning and drying to obtain waste polybutylene terephthalate particles;
2) adding 98 parts by mass of waste polybutylene terephthalate particles, 13 parts by mass of talcum powder with the particle size of 3-15 mu m, 4 parts by mass of glass fiber, 7 parts by mass of triphenyl phosphite, 6 parts by mass of magnesium silicate with the particle size of 2-8 mu m and 4 parts by mass of sucrose ester into a high-speed stirrer, adjusting the rotating speed of the stirrer to 700r/min, stirring for 5min, transferring the material into a double-screw extruder, adjusting the processing temperature of the double-screw extruder to 230-240 ℃, adjusting the rotating speed of the screw to 40-45 r/min, and extruding and granulating to obtain a reclaimed material;
3) adding a regenerated material, 1.5 parts by mass of dilauryl thiodipropionate, 0.5 part by mass of 2- (2' -hydroxy-3 ',5' -di-tert-butylphenyl) -benzotriazole and 3 parts by mass of calcium stearate into a high-speed stirrer, adjusting the rotating speed of the stirrer to 800r/min, stirring for 5min, transferring the material into a double-screw extruder, adjusting the processing temperature of the double-screw extruder to 225-235 ℃, adjusting the rotating speed of the screw to 85-90 r/min, and extruding and granulating to obtain the regenerated polybutylene terephthalate material.
Example 4:
a preparation method of a regenerated polybutylene terephthalate material comprises the following steps:
1) crushing waste polybutylene terephthalate products into particles with the particle size of 1-5 mm, and then removing oil, cleaning and drying to obtain waste polybutylene terephthalate particles;
2) adding 75 parts by mass of waste polybutylene terephthalate particles, 9 parts by mass of tetrapod-like zinc oxide whiskers with the particle size of 3-15 microns, 1 part by mass of glass fibers, 5 parts by mass of terephthaloyl biscaprolactam, 14 parts by mass of zeolite molecular sieves with the particle size of 2-8 microns and 3 parts by mass of polyethylene glycol 400 into a high-speed stirrer, adjusting the rotating speed of the stirrer to 750r/min, stirring for 7min, transferring the material into a double-screw extruder, adjusting the processing temperature of the double-screw extruder to 250-260 ℃, adjusting the rotating speed of a screw to 40-45 r/min, and extruding and granulating to obtain a reclaimed material;
3) adding a regenerated material, 1.6 parts by mass of ascorbic acid, 0.4 part by mass of dilauryl thiodipropionate, 1.8 parts by mass of hexamethylphosphoric triamide and 2.5 parts by mass of barium stearate into a high-speed stirrer, adjusting the rotating speed of the stirrer to 650r/min, stirring for 12min, transferring the material into a double-screw extruder, adjusting the processing temperature of the double-screw extruder to 245-255 ℃, adjusting the rotating speed of a screw to 70-75 r/min, and extruding and granulating to obtain the regenerated polybutylene terephthalate material.
Example 5:
a preparation method of a recycled polyethylene terephthalate material comprises the following steps:
1) crushing the waste polyethylene terephthalate product into particles with the particle size of 1-5 mm, and then removing oil, cleaning and drying to obtain waste polyethylene terephthalate particles;
2) adding 85 parts by mass of waste polyethylene terephthalate particles, 8 parts by mass of calcium carbonate with the particle size of 3-15 mu m, 5 parts by mass of glass fiber, 10 parts by mass of resorcinol diglycidyl ether, 6 parts by mass of zinc oxide with the particle size of 2-8 mu m, 3 parts by mass of activated carbon with the particle size of 2-8 mu m and 3 parts by mass of alkyl glucoside into a high-speed stirrer, adjusting the rotating speed of the stirrer to 550r/min, stirring for 7min, transferring the material into a double-screw extruder, adjusting the processing temperature of the double-screw extruder to 225-235 ℃, adjusting the rotating speed of the screw to 55-60 r/min, and extruding and granulating to obtain a reclaimed material;
3) adding the reclaimed material, 1 part by mass of hydroquinone, 1 part by mass of p-tert-butylcatechol, 1 part by mass of 2, 4-dihydroxybenzophenone, 1 part by mass of calcium stearate and 2 parts by mass of zinc stearate into a high-speed stirrer, adjusting the rotating speed of the stirrer to 750r/min, stirring for 5min, transferring the material into a double-screw extruder, adjusting the processing temperature of the double-screw extruder to 225-235 ℃, adjusting the rotating speed of the screw to 75-80 r/min, and extruding and granulating to obtain the regenerated polyethylene terephthalate material.
Comparative example 1:
a preparation method of a recycled polyethylene terephthalate material comprises the following steps:
the procedure of example 5 was repeated, except that no chain extender (10 parts by mass of resorcinol diglycidyl ether) was added in step 2).
Comparative example 2:
a preparation method of a recycled polyethylene terephthalate material comprises the following steps:
the components and preparation method were exactly the same as in example 5, except that the inorganic filler (8 parts by mass of calcium carbonate having a particle size of 3 to 15 μm) and the glass fiber (5 parts by mass of glass fiber) were not added in step 2).
Comparative example 3:
a preparation method of a recycled polyethylene terephthalate material comprises the following steps:
the components and preparation method were exactly the same as in example 5, except that the antioxidant (1 part by mass of hydroquinone +1 part by mass of p-t-butylcatechol), the ultraviolet absorber (1 part by mass of 2, 4-dihydroxybenzophenone), and the heat stabilizer (1 part by mass of calcium stearate +2 parts by mass of zinc stearate) were not added in step 3).
Comparative example 4:
a preparation method of a recycled polyethylene terephthalate material comprises the following steps:
the waste polyethylene terephthalate product (same as the example 1) is crushed into particles with the particle size of 1-5 mm, and then the particles are deoiled, cleaned and dried to obtain the regenerated polyethylene terephthalate material.
Comparative example 5:
a preparation method of a recycled polycarbonate material comprises the following steps:
and (3) crushing the waste polycarbonate product (same as the example 2) into particles with the particle size of 1-5 mm, and then removing oil, cleaning and drying to obtain the regenerated polycarbonate material.
Comparative example 6:
a preparation method of a regenerated polybutylene terephthalate material comprises the following steps:
the waste polybutylene terephthalate product (same as the example 3) is crushed into particles with the particle size of 1-5 mm, and then the particles are deoiled, cleaned and dried to obtain the regenerated polybutylene terephthalate material.
Comparative example 7:
polyethylene terephthalate particles.
And (3) performance testing:
the products of examples 1-5 and comparative examples 1-7 were tested for performance, and the results are shown in the following table:
TABLE 1 Performance test results for the products of examples 1-5 and comparative examples 1-7
Figure BDA0002648343630000071
Figure BDA0002648343630000081
Note:
tensile strength: the test is carried out with reference to GB/T1040.2-2006 determination of the tensile properties of plastics;
elongation at break: the test is carried out with reference to GB/T1040.2-2006 determination of the tensile properties of plastics;
bending strength: the test is carried out according to the test method of the bending property of GB/T9341-;
aging: the test sample is aged according to the GB/T7141 and 2008 plastic thermal aging test method, and the aging condition is 150 ℃ for 48 hours of thermal aging.
As can be seen from Table 1:
1) compared with the waste polyester, the physical properties of the regenerated polyester materials prepared in the embodiments 1-5 are greatly improved;
2) as can be seen from the comparison between example 5 and comparative examples 1 and 2, the filling of the inorganic filler can improve the physical properties to a certain extent, but the effect is not as good as the effect of chain extension to increase the molecular weight of the polymer, and the chain extension can effectively improve the elongation at break of the recycled plastic and increase the plasticity and processability of the recycled plastic to a certain extent;
3) after the thermal aging test, the physical properties of the recycled polyester materials of examples 1 to 5 do not drop greatly, the recycled polyester materials have good aging resistance and can prolong the service life, and the performance of the recycled polyester materials of comparative example 3 without the addition of the antioxidant, the ultraviolet absorber and the heat stabilizer is greatly reduced after the aging test, so that the service life of the recycled plastic is short.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (10)

1. The recycled polyester material is characterized by comprising the following components in parts by mass:
waste polyester: 70-100 parts;
inorganic filler: 5-20 parts of a solvent;
glass fiber: 1-5 parts;
chain extender: 3-15 parts;
odor removing agent: 3-15 parts;
dispersing agent: 1-5 parts;
antioxidant: 0.5-2 parts;
ultraviolet absorber: 0.5-2 parts;
thermal stabilizer: 1-3 parts.
2. The recycled polyester material of claim 1, wherein: the waste polyester is at least one of waste polycarbonate, waste polyethylene terephthalate and waste polybutylene terephthalate.
3. The recycled polyester material of claim 1, wherein: the inorganic filler is at least one of calcium carbonate, talcum powder, tetrapod-like zinc oxide whiskers and silicon dioxide.
4. The recycled polyester material as claimed in any one of claims 1 to 3, wherein: the chain extender is at least one of phthalic anhydride, 1,4,5, 8-naphthalene tetracarboxylic anhydride, pyromellitic dianhydride, terephthaloyl biscaprolactam, 1, 4-butanediol diglycidyl ether, ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, resorcinol diglycidyl ether, glycerol and triphenyl phosphite.
5. The recycled polyester material as claimed in any one of claims 1 to 3, wherein: the deodorant is at least one of fine-pore silica gel, porous alumina, zinc oxide, activated carbon, magnesium silicate, diatomite and zeolite molecular sieve.
6. The recycled polyester material as claimed in any one of claims 1 to 3, wherein: the dispersing agent is at least one of sodium lauryl sulfate, polyethylene glycol, polyethylene wax, lecithin, sucrose ester, alkyl glucoside, dioctyl sodium sulfosuccinate and sodium glycocholate.
7. The recycled polyester material as claimed in any one of claims 1 to 3, wherein: the antioxidant is at least one of ascorbic acid, dilauryl thiodipropionate, butyl hydroxy anisole, hydroquinone, p-tert-butyl catechol, di-tert-butyl p-cresol, N-diphenyl p-phenylenediamine and dialkyl diphenylamine.
8. The recycled polyester material as claimed in any one of claims 1 to 3, wherein: the ultraviolet absorbent is at least one of 2, 4-dihydroxy benzophenone, phenyl o-hydroxybenzoate, 2-hydroxy-4-methoxybenzophenone, 2- (2' -hydroxy-3 ',5' -di-tert-butylphenyl) -benzotriazole, 4-benzoyloxy-2, 2,6, 6-tetramethylpiperidine and hexamethylphosphoric triamide.
9. The recycled polyester material as claimed in any one of claims 1 to 3, wherein: the heat stabilizer is at least one of magnesium stearate, zinc stearate, calcium stearate and barium stearate.
10. The method for preparing the recycled polyester material as claimed in any one of claims 1 to 9, comprising the steps of:
1) crushing, deoiling, cleaning and drying the waste polyester product to obtain waste polyester particles;
2) mixing and stirring the waste polyester particles, the inorganic filler, the glass fiber, the chain extender, the deodorant and the dispersing agent uniformly, adding the mixture into a double-screw extruder, and extruding and granulating to obtain a reclaimed material;
3) and mixing and stirring the reclaimed material, the antioxidant, the ultraviolet absorbent and the heat stabilizer uniformly, adding the mixture into a double-screw extruder, and extruding and granulating to obtain the reclaimed polyester material.
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