CN108976545B - High-strength rainwater collection system accessory and preparation method thereof - Google Patents
High-strength rainwater collection system accessory and preparation method thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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Abstract
The invention belongs to the technical field of pipeline materials, and provides a novel high-strength rainwater collection system accessory and a preparation method thereof, wherein the rainwater collection system accessory is composed of the following components in parts by weight: 50-60 parts of polyethylene, 30-50 parts of thermoplastic elastomer, 5-30 parts of long glass fiber, 1-20 parts of polyester fiber or carbon fiber, 1-2 parts of poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer, 5-7 parts of maleic anhydride grafted thermoplastic elastomer, 1-10 parts of filler, 0.5-1 part of lubricant, 1-2 parts of antioxidant and 0.5-1 part of release agent, and the problems of low strength, poor impact resistance, poor toughness, poor flame retardant property and the like of accessories of a rainwater collection system in the prior art are solved.
Description
Technical Field
The invention belongs to the technical field of pipeline materials, and relates to a novel high-strength rainwater collecting system accessory and a preparation method thereof.
Background
The water resource waste in China is very serious, and the fact that the water resource is insufficient is not struggle. How to recycle water resources and reduce the waste of water resources becomes a primary task. Along with the increasing increase of the contradiction between water resource supply and demand, the energy-saving call is higher and higher, so that the rainwater is more and more paid attention to the recycling. And a rainwater collection system is adopted, so that the sustainable development strategy of China is met. In the past, the fittings of the rainwater collection system mostly adopt galvanized steel pipes and reinforced concrete pipes, and the galvanized steel pipes and the reinforced concrete pipes can bear higher working pressure and are durable, but have the defects of great weight, hard and brittle texture, collision resistance, easy leakage of interfaces and the like. At present, fittings of a rainwater collection system mostly adopt plastic pipes, and the plastic pipes have the characteristics of better corrosion resistance and shock resistance, energy conservation, metal conservation, light weight, convenience in installation and the like compared with steel pipes and reinforced concrete, but have the defects of low strength, poor impact resistance, poor toughness, poor flame retardant property and the like.
Disclosure of Invention
The invention provides a novel high-strength rainwater collection system accessory, which solves the problems of low strength, poor impact resistance, poor toughness, poor flame retardant property and the like of a rainwater collection system accessory in the prior art.
The technical scheme of the invention is realized as follows:
a novel high-strength rainwater collection system accessory is composed of the following components in parts by weight:
50-60 parts of polyethylene, 30-50 parts of thermoplastic elastomer, 5-30 parts of long glass fiber, 1-20 parts of polyester fiber or carbon fiber, 1-2 parts of poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer, 5-7 parts of maleic anhydride grafted thermoplastic elastomer, 1-10 parts of filler, 0.5-1 part of lubricant, 1-2 parts of antioxidant and 0.5-1 part of release agent;
the poly polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer comprises repeating structural units of polyhedral oligomeric silsesquioxane and methyl methacrylate, wherein the number ratio of the polyhedral oligomeric silsesquioxane to the polymethyl methacrylate is 1: 90-100, the molecular weight is 10000-11000, and the formula is as follows:
wherein m is 90-100.
As a further technical scheme, the feed additive comprises the following components in parts by weight:
57 parts of polyethylene, 40 parts of thermoplastic elastomer, 20 parts of long glass fiber, 2 parts of polyester fiber or carbon fiber, 1.5 parts of poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer, 6 parts of maleic anhydride grafted thermoplastic elastomer, 5 parts of filler, 0.8 part of lubricant, 1.6 parts of antioxidant and 0.7 part of release agent;
the poly polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer comprises repeating structural units of polyhedral oligomeric silsesquioxane and methyl methacrylate, wherein the number ratio of the polyhedral oligomeric silsesquioxane to the polymethyl methacrylate is 1: 90-100, and the molecular weight is 10000-11000.
As a further technical scheme, the polyhedral oligomeric silsesquioxane is grafted to a polymethyl methacrylate main chain by free radical polymerization through an initiator, a ligand and a brominating agent, so as to form a poly polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer, wherein the initiator is bromine isobutyryl bromide, the dosage of the initiator is 25% of the mass of the polyhedral oligomeric silsesquioxane, the ligand is triethylamine, the dosage of the ligand is 1% of the mass of the polyhedral oligomeric silsesquioxane, the brominating agent is cuprous bromide, the dosage of the brominating agent is 1% of the mass of the polyhedral oligomeric silsesquioxane, and the dosage of the methyl methacrylate is 15 times of the mass of the polyhedral oligomeric silsesquioxane.
As a further technical scheme, the thermoplastic elastomer is a polyolefin elastomer or a polyurethane elastomer.
As a further technical scheme, the filler is one of talcum powder, graphite, argil and calcium carbonate.
According to a further technical scheme, the antioxidant is an antioxidant 1010, the lubricant is fatty acid amide, and the release agent is methyl silicone oil.
As a further technical scheme, the length of the long glass fiber is 4-6 mm, and the length of the polyester fiber or the carbon fiber is 6-7 mm.
A preparation method of a novel high-strength rainwater collecting system accessory comprises the following steps:
s1, dissolving an initiator, a ligand, a brominating agent and polyhedral oligomeric silsesquioxane in tetrahydrofuran solution according to a ratio, adding the mixture into a reaction kettle, adding methyl methacrylate, reacting in an oil bath at 60 ℃ for 12 hours, dissolving the mixture with tetrahydrofuran, removing redundant solvent by rotary evaporation, precipitating in petroleum ether, and drying in vacuum to obtain a polyhedrosis oligomeric silsesquioxane-polymethyl methacrylate copolymer;
s2, weighing each component for later use according to the formula of the novel high-strength rainwater collection system accessory;
s3, adding long glass fibers, polyester fibers or carbon fibers, thermoplastic elastomers and maleic anhydride grafted thermoplastic elastomers into a high-speed mixer, mixing for 3-5 min at the rotating speed of 2000-2500 r/min in the high-speed mixer, adding the mixed materials into a co-rotating meshed double-screw extruder, and extruding and granulating at the extrusion temperature of 170-190 ℃ to obtain the fiber reinforced thermoplastic elastomer;
s4, mixing polyethylene, a filler and an antioxidant in a high-speed mixer at a rotating speed of 1500r/min for 5min, adding the poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer obtained in S2 and the fiber reinforced thermoplastic elastomer obtained in S3, adding a lubricant and a release agent, uniformly mixing, placing in a single-screw extruder, setting the temperature of a feeding section of the single-screw extruder to be 160-180 ℃, the temperature of a melting section to be 180-240 ℃, the temperature of a homogenizing section to be 200-260 ℃, the temperature of a die head to be 170-220 ℃, performing melt extrusion molding, and setting the rotating speed of a screw to be 50-150r/min to obtain the novel high-strength rainwater collection system accessory.
The invention has the following using principle and beneficial effects:
the toughness, mechanical strength and flame retardance of the rainwater collection system accessory obtained by the embodiment of the invention are obviously improved, the preparation process is simple, the cost is lower, the production efficiency is high, and the rainwater collection system accessory prepared by the process has better comprehensive performances such as toughness, mechanical strength and flame retardance, and has wide application prospect.
The polyhedronoligomeric silsesquioxane-polymethyl methacrylate copolymer is added to improve the mechanical properties of the material, such as weather resistance, impact resistance, flame retardance, tensile strength, elongation at break, bending strength and the like. The polyhedral oligomeric silsesquioxane has unique nanoscale size and inorganic structural framework of silicon-oxygen-silicon, so that the mechanical properties of the material such as tensile strength, elongation at break, bending strength and the like can be remarkably improved, polyhedral oligomeric silsesquioxane molecules are inorganic cores which are composed of silicon-oxygen bonds and have good thermal stability, and when the polyhedral oligomeric silsesquioxane is heated and decomposed, a layer of silicon dioxide film is formed, so that the oxidation process can be effectively prevented from continuing, and the flame retardant property of the material is improved; the polymethyl methacrylate has good impact resistance, and the impact resistance of the material is improved.
The invention adopts long glass fiber matched with polyester fiber or carbon fiber to enhance the mechanical properties of the material, such as tensile strength, elongation at break, bending strength and the like. However, the interface compatibility of the long glass fiber, the polyester fiber or the carbon fiber with polyethylene and the thermoplastic elastomer is poor, and the composite reinforcing effect is not achieved, so that the maleic anhydride grafted thermoplastic elastomer is added to enhance the interface compatibility, and the tensile strength, the elongation at break and the bending strength of the material are improved.
According to the invention, the long glass fiber, the polyester fiber or the carbon fiber, the polyhedronoligomeric silsesquioxane-polymethyl methacrylate copolymer and the like can be used for remarkably improving the toughness, the mechanical strength and the flame retardance of the material, and meanwhile, the antioxidant is added, so that the oxidation resistance of the material is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: the method comprises the following steps:
s1, dissolving an initiator, a ligand, a brominating agent and polyhedral oligomeric silsesquioxane in tetrahydrofuran solution according to a ratio, adding the mixture into a reaction kettle, adding methyl methacrylate, reacting in an oil bath at 60 ℃ for 12 hours, dissolving the mixture with tetrahydrofuran, removing redundant solvent by rotary evaporation, precipitating in petroleum ether, and drying in vacuum to obtain a polyhedrosis oligomeric silsesquioxane-polymethyl methacrylate copolymer;
s2, weighing the components according to the following formula of the rainwater collection system accessories for later use:
50 parts of polyethylene, 30 parts of polyolefin elastomer, 5 parts of long glass fiber, 20 parts of polyester fiber, 1 part of poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer, 5 parts of maleic anhydride grafted polyolefin elastomer, 1 part of calcium carbonate, 0.5 part of fatty acid amide, 10101 part of antioxidant and 0.5 part of methyl silicone oil;
s3, adding long glass fibers, polyester fibers, thermoplastic elastomers and maleic anhydride grafted thermoplastic elastomers into a high-speed mixer, mixing for 3-5 min at the rotating speed of 2000-2500 r/min in the high-speed mixer, adding the mixed materials into a co-rotating meshed double-screw extruder, and extruding and granulating at the extrusion temperature of 170-190 ℃ to obtain the fiber reinforced thermoplastic elastomer;
s4, mixing polyethylene, calcium carbonate and an antioxidant 1010 in a high-speed mixer at a rotating speed of 1500r/min for 5min, adding the poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer obtained in S2 and the fiber-reinforced polyolefin elastomer obtained in S3, adding fatty acid amide and methyl silicone oil, mixing uniformly, placing the mixture in a single-screw extruder, setting the temperature of a feeding section of the single-screw extruder to be 160-180 ℃, the temperature of a melting section to be 180-240 ℃, the temperature of a homogenizing section to be 200-260 ℃, the temperature of a die head to be 170-220 ℃, performing melt extrusion molding, and setting the rotating speed of a screw to be 50-150r/min to obtain the novel high-strength rainwater collection system accessory.
Example two: the formula of the rainwater collection system accessory is as follows: 57 parts of polyethylene, 40 parts of polyolefin elastomer, 20 parts of long glass fiber, 2 parts of polyester fiber, 1.5 parts of poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer, 6 parts of maleic anhydride grafted polyolefin elastomer, 5 parts of calcium carbonate, 0.8 part of fatty acid amide, 10101.6 parts of antioxidant and 0.7 part of methyl silicone oil; the rest steps are the same as the first embodiment.
Example three: the formula of the rainwater collection system accessory is as follows: 60 parts of polyethylene, 50 parts of polyolefin elastomer, 30 parts of long glass fiber, 1 part of polyester fiber, 2 parts of poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer, 7 parts of maleic anhydride grafted polyolefin elastomer, 10 parts of calcium carbonate, 1 part of fatty acid amide, 2 parts of antioxidant and 1 part of methyl silicone oil; the rest steps are the same as the first embodiment.
Comparative example one: the formula of the rainwater collection system accessory comprises 57 parts of polyethylene, 40 parts of polyolefin elastomer, 20 parts of long glass fiber, 2 parts of polyester fiber, 6 parts of maleic anhydride grafted polyolefin elastomer, 5 parts of calcium carbonate, 0.8 part of fatty acid amide, 10101.6 parts of antioxidant and 0.7 part of methyl silicone oil; correspondingly, S1 in the first embodiment is deleted, and the rest steps are the same as those in the first embodiment.
Comparative example two: the formula of the rainwater collection system accessory is as follows: 57 parts of polyethylene, 40 parts of polyolefin elastomer, 20 parts of long glass fiber, 2 parts of polyester fiber, 1.5 parts of poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer, 5 parts of calcium carbonate, 0.8 part of fatty acid amide, 10101.6 parts of antioxidant and 0.7 part of methyl silicone oil; correspondingly, the maleic anhydride grafted polyolefin elastomer in S3 in the first example is removed, and the long glass fiber, the polyester fiber and the polyolefin elastomer are directly added into the high-speed mixer, and the rest steps are the same as the first example.
Comparative example three: the formula of the rainwater collection system accessory is as follows: 57 parts of polyethylene, 40 parts of polyolefin elastomer, 20 parts of long glass fiber, 2 parts of poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer, 5 parts of calcium carbonate, 0.8 part of fatty acid amide, 10101.6 parts of antioxidant and 0.7 part of methyl silicone oil; correspondingly, the step S3 in the first embodiment and the steps related thereto are deleted, and the rest of the steps are the same as those in the first embodiment.
Comparative example four: the formula of the rainwater collection system accessory is as follows: 57 parts of polyethylene, 40 parts of polyolefin elastomer, 5 parts of calcium carbonate, 0.8 part of fatty acid amide, 10101.6 parts of antioxidant and 0.7 part of methyl silicone oil; correspondingly, the steps S1 and S3 in the first embodiment and the steps related to the steps are deleted, and the rest steps are the same as those in the first embodiment
The tensile strength, notched impact strength, elongation at break, flexural strength, melting and crystallization temperatures, thermal stability, flame retardant rating, corrosion resistance were measured for the above examples and comparative examples as follows:
1. and (3) measuring the tensile strength: testing according to a test method of the tensile property of GB/T1447-;
2. and (3) impact strength measurement: the notch impact strength of the cantilever beam is tested according to GB/T1843-2008, the specification of the pendulum is 2.75J, and a sample is provided with a V-shaped notch;
3. determination of elongation at break: testing according to a test method of the tensile property of GB/T1447-;
4. and (3) measuring the bending strength: testing according to a testing method for testing the bending of GB/T9341-2000 plastic, wherein the sample size is 80mm in length, 10mm in width, 4mm in thickness and 5mm/min in testing speed;
5. and (3) flame retardant grade determination: the test is carried out according to the American UL94 standard, and the sample size is 27mm in length, 12.7mm in width and 1.6mm in thickness;
the results of the measurements are shown in the following table
The data in the table show that compared with the toughness, the mechanical strength and the flame retardance of the rainwater collection system fitting obtained by the embodiment of the invention are obviously improved, the preparation process is simple, the cost is lower, the production efficiency is high, and the rainwater collection system fitting prepared by the process of the invention has better comprehensive properties such as toughness, mechanical strength and flame retardance and has wide application prospect.
As can be seen from the data of the second example and the first comparative example in the table, the addition of the poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer improves the mechanical properties of the material, such as weather resistance, impact resistance, flame retardance, tensile strength, elongation at break, bending strength and the like. The polyhedral oligomeric silsesquioxane has unique nanoscale size and inorganic structural framework of silicon-oxygen-silicon, so that the mechanical properties of the material such as tensile strength, elongation at break, bending strength and the like can be remarkably improved, polyhedral oligomeric silsesquioxane molecules are inorganic cores which are composed of silicon-oxygen bonds and have good thermal stability, and when the polyhedral oligomeric silsesquioxane is heated and decomposed, a layer of silicon dioxide film is formed, so that the oxidation process can be effectively prevented from continuing, and the flame retardant property of the material is improved; the polymethyl methacrylate has good impact resistance, and the impact resistance of the material is improved.
The invention adopts long glass fiber matched with polyester fiber or carbon fiber to enhance the mechanical properties of the material, such as tensile strength, elongation at break, bending strength and the like. The data of the second example and the second comparative example in the table show that the interface compatibility of the long glass fiber and the polyester fiber with polyethylene and the thermoplastic elastomer is poor and does not play a role of composite reinforcement, so that the maleic anhydride grafted thermoplastic elastomer is added to enhance the interface compatibility, thereby improving the tensile strength, the elongation at break and the bending strength of the material.
The data of the second example and the fourth comparative example in the table show that the toughness, the mechanical strength and the flame retardance of the material can be remarkably improved by matching the long glass fiber, the polyester fiber or the carbon fiber with the poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer and the like, and meanwhile, the oxidation resistance of the material is improved by adding the antioxidant 1010.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A high-strength rainwater collection system accessory is characterized by comprising the following components in parts by weight:
50-60 parts of polyethylene, 30-50 parts of thermoplastic elastomer, 5-30 parts of long glass fiber, 1-20 parts of polyester fiber or carbon fiber, 1-2 parts of poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer, 5-7 parts of maleic anhydride grafted thermoplastic elastomer, 1-10 parts of filler, 0.5-1 part of lubricant, 1-2 parts of antioxidant and 0.5-1 part of release agent;
the poly polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer comprises repeating structural units of polyhedral oligomeric silsesquioxane and methyl methacrylate, wherein the number ratio of the polyhedral oligomeric silsesquioxane to the polymethyl methacrylate is 1: 90-100, the molecular weight is 10000-11000, and the formula is as follows:
wherein m is 90-100.
2. A high strength stormwater collection system accessory as claimed in claim 1, comprising, in parts by weight:
57 parts of polyethylene, 40 parts of thermoplastic elastomer, 20 parts of long glass fiber, 2 parts of polyester fiber or carbon fiber, 1.5 parts of poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer, 6 parts of maleic anhydride grafted thermoplastic elastomer, 5 parts of filler, 0.8 part of lubricant, 1.6 parts of antioxidant and 0.7 part of release agent;
the poly polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer comprises repeating structural units of polyhedral oligomeric silsesquioxane and methyl methacrylate, wherein the number ratio of the polyhedral oligomeric silsesquioxane to the polymethyl methacrylate is 1: 90-100, and the molecular weight is 10000-11000.
3. A high strength stormwater collection system accessory as claimed in claim 1,
the polyhedral oligomeric silsesquioxane is grafted to a polymethyl methacrylate main chain through free radical polymerization by an initiator, a ligand and a brominating agent, so that a polyhedronoligomeric silsesquioxane-polymethyl methacrylate copolymer is formed, wherein the initiator is bromine isobutyryl bromide, the using amount of the bromine isobutyryl bromide is 25% of the mass of the polyhedral oligomeric silsesquioxane, the ligand is triethylamine, the using amount of the triethylamine is 1% of the mass of the polyhedral oligomeric silsesquioxane, the brominating agent is cuprous bromide, the using amount of the brominating agent is 1% of the mass of the polyhedral oligomeric silsesquioxane, and the using amount of the methyl methacrylate is 15 times of the mass of the polyhedral oligomeric silsesquioxane.
4. A high strength rainwater collection system accessory according to claim 1 wherein said thermoplastic elastomer is a polyolefin elastomer or a polyurethane elastomer.
5. A high strength rainwater collection system accessory according to claim 1 wherein said filler is one of talc, graphite, china clay, calcium carbonate.
6. The high strength rainwater collection system accessory according to claim 1 wherein said antioxidant is antioxidant 1010, said lubricant is a fatty acid amide, and said release agent is methyl silicone oil.
7. A high strength rainwater collection system according to claim 1 wherein said long glass fibres are 4 to 6mm in length and said polyester or carbon fibres are 6 to 7mm in length.
8. A preparation method of a high-strength rainwater collection system accessory is characterized by comprising the following steps:
s1, dissolving an initiator, a ligand, a brominating agent and polyhedral oligomeric silsesquioxane in a tetrahydrofuran solution in proportion, adding the mixture into a reaction kettle, adding methyl methacrylate, reacting in an oil bath at 60 ℃ for 12 hours, dissolving the mixture with tetrahydrofuran, removing redundant solvent by rotary evaporation, precipitating in petroleum ether, and drying in vacuum to obtain a polyhedrosis oligomeric silsesquioxane-polymethyl methacrylate copolymer;
s2, weighing each component for later use according to the formula of the high-strength rainwater collection system accessory in claim 1;
s3, adding long glass fibers, polyester fibers or carbon fibers, thermoplastic elastomers and maleic anhydride grafted thermoplastic elastomers into a high-speed mixer, mixing for 3-5 min at the rotating speed of 2000-2500 r/min in the high-speed mixer, adding the mixed materials into a co-rotating meshed double-screw extruder, and extruding and granulating at the extrusion temperature of 170-190 ℃ to obtain the fiber reinforced thermoplastic elastomer;
s4, mixing polyethylene, a filler and an antioxidant in a high-speed mixer at a rotating speed of 1500r/min for 5min, adding the poly-polyhedral oligomeric silsesquioxane-polymethyl methacrylate copolymer obtained in S2 and the fiber reinforced thermoplastic elastomer obtained in S3, adding a lubricant and a release agent, uniformly mixing, placing in a single-screw extruder, setting the temperature of a feeding section of the single-screw extruder to be 160-180 ℃, the temperature of a melting section to be 180-240 ℃, the temperature of a homogenizing section to be 200-260 ℃, the temperature of a die head to be 170-220 ℃, performing melt extrusion molding, and setting the rotating speed of a screw to be 50-150r/min to obtain the high-strength rainwater collection system accessory.
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