CN111560162A - Preparation method of enhanced PC/ABS alloy flame-retardant plate - Google Patents
Preparation method of enhanced PC/ABS alloy flame-retardant plate Download PDFInfo
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- CN111560162A CN111560162A CN202010643173.0A CN202010643173A CN111560162A CN 111560162 A CN111560162 A CN 111560162A CN 202010643173 A CN202010643173 A CN 202010643173A CN 111560162 A CN111560162 A CN 111560162A
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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
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- 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
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- 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
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- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/004—Additives being defined by their length
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
Abstract
The invention belongs to the technical field of polymer-based reinforced materials, and particularly relates to a preparation method of an enhanced PC/ABS alloy flame-retardant plate. The carbon nano tube/graphene with a three-dimensional network structure is added to the board making raw material of the flame-retardant board. The flame-retardant sheet material prepared by the preparation method has excellent flame retardance and still keeps good mechanical properties.
Description
Technical Field
The invention belongs to the technical field of polymer-based reinforced materials, and particularly relates to a preparation method of an enhanced PC/ABS alloy flame-retardant plate.
Background
The PC/ABS alloy is a thermoplastic engineering plastic alloy with excellent performance, easy processing, high quality, low price and great commercial value, and is widely applied to the fields of automobile industry, household appliances, office equipment and the like. In order to meet the fireproof safety requirement in the application field, the PC/ABS alloy must have good flame retardance, and the flame-retardant PC/ABS alloy material improves the flame retardance of the material on the basis and has good fireproof performance, but the strength of the alloy material is greatly reduced by adding the flame retardant.
The research of the plastic machinery and the plastic engineering of Beijing university of chemical industry finds that the acrylate toughening agent can obviously improve the toughness of the PC/ABS alloy, and the phosphate flame retardant has good flame retardant effect on the PC/ABS alloy, but greatly reduces the impact property of the alloy. The Guiyang professional technical college blends the flame retardant BDP, the toughening agent MBS and the PC/ABS alloy, and the result shows that when the dosage of BDP exceeds 12 percent, the impact performance of the alloy is obviously reduced. The university of Changzhou college of materials science and engineering finds that polyaryl phosphate PX220 and nano-montmorillonite have a very good synergistic flame retardant effect, but the result shows that the montmorillonite has a certain synergistic flame retardant effect, but is incompatible with PC/ABS alloy, has poor adhesive force and reduces the mechanical strength of the material.
Therefore, the problem that the flame retardant property and the mechanical strength of the PC/ABS alloy plate cannot be simultaneously considered is urgently needed to be solved.
Disclosure of Invention
The invention aims to provide a preparation method of an enhanced PC/ABS alloy flame-retardant plate aiming at the defects that the flame-retardant property and the mechanical strength of the plate of the existing PC/ABS alloy flame-retardant plate can not be simultaneously considered and are even in inverse proportion.
The technical scheme of the invention is as follows: a preparation method of an enhanced PC/ABS alloy flame-retardant plate is characterized in that a carbon nano tube/graphene with a three-dimensional network structure is added to a plate-making raw material of the flame-retardant plate.
The plate-making raw materials of the flame-retardant plate further comprise PC resin, ABS resin, nano zinc phosphate, a flame retardant, a toughening agent, an antioxidant and a lubricant.
The board-making raw materials of the flame-retardant board are as follows in parts by weight: 0.00001-0.1 part of carbon nano tube/graphene, 35-45 parts of PC resin, 1-20 parts of ABS resin, 0.1-6 parts of nano zinc phosphate, 1-10 parts of polyaromatic ester phosphate flame retardant, 0.1-6 parts of silicon triazine char forming synergist, 0.1-6 parts of toughening agent, 0.1-2 parts of antioxidant and 0.1-1 part of lubricant.
Firstly, carrying out freeze drying on graphene/carbon nanotube three-dimensional hydrogel prepared from acidified carbon nanotubes and graphene oxide to obtain carbon nanotubes/graphene with a three-dimensional network structure; and then mixing the obtained carbon nano tube/graphene serving as a plate making raw material with other plate making raw materials such as PC resin, ABS resin, nano zinc phosphate, a flame retardant, a toughening agent, an antioxidant and a lubricant, and then placing the mixture in a plate making machine for making a plate.
The preparation method of the enhanced PC/ABS alloy flame-retardant plate comprises the following steps:
(1) firstly, uniformly dispersing 1 part by weight of graphene oxide in water to prepare graphene oxide hydrosol; then adding 0.1-1 part by weight of acidified carbon nano tube and 0.5-2 parts by weight of NaHSO4Stirring for 2-5 h at normal temperature, placing in an ultrasonic instrument, and carrying out ultrasonic treatment for 2-5 h under the stirring condition to obtain a uniformly mixed mixture; placing the mixture in a vacuum freeze dryer for freezing and drying for 24 hours at-60 ℃ to prepare a carbon nanotube/graphene plate-making raw material with a three-dimensional network structure;
(2) stirring and mixing 0.00001-0.1 part by weight of the carbon nano tube/graphene obtained in the step (1) with 35-45 parts by weight of PC resin, 1-20 parts by weight of ABS resin, 0.1-6 parts by weight of nano zinc phosphate, 1-10 parts by weight of polyaromatic ester phosphate flame retardant, 0.1-6 parts by weight of silicon triazine char-forming synergist, 0.1-6 parts by weight of flexibilizer, 0.1-2 parts by weight of antioxidant and 0.1-1 part by weight of lubricant to obtain a uniformly mixed board making raw material mixture;
(3) putting the mixed material obtained in the step (2) into an extruder for melt extrusion granulation to obtain an enhanced PC/ABS alloy material;
(4) and (4) adding the enhanced PC/ABS alloy material obtained in the step (3) into a plate making machine to obtain the enhanced PC/ABS alloy flame-retardant plate.
The diameter of the acidified carbon nano tube is 2 nm-50 nm, and the length of the acidified carbon nano tube is 10 mu m-50 mu m; the graphene oxide is of a monolithic layer structure, and the particle size is 4-10 microns.
The particle size of the nano zinc phosphate is 45 nm; the density of the PC resin was 1.35g/cm3。
The grain size of the polyaromatic ester phosphate flame retardant is 20-30 μm; the grain size of the silicon triazine charring synergist is 10-15 mu m.
The technological parameters of the melt extrusion granulation in the step (3) are as follows: the temperature of the first zone is 170-180 ℃; the temperature of the second zone is 180-2000 ℃; the temperature of the three zones is 200-220 ℃; the temperature of the fourth zone is 220-240 ℃; the temperature of the fifth area is 240-250 ℃; the temperature of the sixth area is 230-240 ℃; the temperature of the seven zones is 220-230 ℃; the temperature of the eight regions is 200-220 ℃; the temperature of the machine head is 240-250 ℃; the retention time is 3-4 min; the melt pressure is 3.0-4.0 MPa, and the vacuum degree is-0.06-0.03 MPa.
The invention has the beneficial effects that: the preparation method of the enhanced PC/ABS alloy flame-retardant plate comprises the steps of taking carbon nano tubes/graphene with a three-dimensional network structure as one of plate making raw materials, firstly preparing three-dimensional hydrogel of the graphene and the carbon nano tubes by using an acidified carbon nano tube and graphene oxide by adopting a self-assembly method, preparing a carbon nano tube/graphene material with the three-dimensional network structure by adopting a freeze drying method, then mixing the three-dimensional carbon nano tube/graphene with PC resin, ABS resin, nano zinc phosphate, a flame retardant, a toughening agent, an antioxidant and a lubricant, and placing the mixture in a plate making machine to make the plate.
Compared with the prior art, the enhanced PC/ABS alloy flame-retardant sheet material prepared by the preparation method has high modulus and high fluidity, and has excellent flame-retardant property and mechanical property.
1. The carbon nano tube/graphene with the three-dimensional network structure is used as a plate making raw material, the specific surface area of the carbon nano tube and the graphene is large, and the plate has high modulus, high strength and high toughness, the plate has very high specific surface area and rich pore channel structures due to the addition of the carbon nano tube/graphene, the contact area between the plate and a base body can be increased due to the high specific surface area, the rich pore channel structures can tightly wrap the base body material, a three-dimensional reinforcing effect can be achieved, and the mechanical property of the plate is greatly improved.
2. Only a small amount of carbon nano tube/graphene needs to be added to achieve a good enhancement effect.
3. The polyaryl phosphate flame retardant and the silicon triazine charring agent are matched to form a composite system, so that the composite system has an obvious synergistic flame retardant effect in a PC/ABS system, and the flame retardant efficiency is further improved.
4. The addition of the nano zinc phosphate can improve the fluidity of the melt, and further ensure the dispersion effect of the carbon nano tube/graphene in the matrix during extrusion.
In conclusion, the reinforced PC/ABS alloy flame-retardant sheet material prepared by the invention effectively solves the problem that the strength of an alloy material is reduced by adding a flame retardant, and improves the mechanical strength and has good flame-retardant property through the three-dimensional reinforcing effect of the three-dimensional carbon nano tube/graphene.
Detailed Description
The present invention will be described in detail below with reference to examples.
The names of the components in the examples are as follows:
graphene oxide (Shanghai test national medicine)
Acidified carbon nanotube (Shanghai test national medicine)
PC resin (U.S. import DuPont Surlyn)
ABS resin (U.S. import DuPont)
Nanometer zinc phosphate (Shanghai test national medicine)
Poly aromatic ester phosphate flame retardant (Ruihong RH-03W101)
Silicon series triazine charring synergist (Xijia chemical industry)
Toughening agent (Xiamen ai Si E001)
Antioxidant (Changrong chemical industry ring phosphate)
Lubricant (American import DuPont NC010)
Example 1
The preparation method of the enhanced PC/ABS alloy flame-retardant plate comprises the following steps:
(1) firstly, uniformly dispersing 10mg of graphene oxide in 40ml of water to prepare graphene oxide hydrosol; then adding 5mg of acidified carbon nano tube and then adding 10mg of NaHSO4Stirring for 3h at normal temperature, placing in an ultrasonic instrument, and performing ultrasonic treatment for 3h under the stirring condition to obtain a uniformly mixed mixture; placing the mixture in a vacuum freeze dryer at-60 ℃ for freezing and drying for 24h to prepare a carbon nanotube/graphene plate-making raw material with a three-dimensional network structure;
(2) stirring and mixing 0.00005 parts by weight of the carbon nano tube/graphene obtained in the step (1) with 35 parts by weight of PC resin, 8 parts by weight of ABS resin, 0.5 part by weight of nano zinc phosphate, 1 part by weight of polyaromatic ester phosphate flame retardant, 0.1 part by weight of silicon triazine char forming synergist, 1 part by weight of toughening agent, 0.5 part by weight of antioxidant and 0.5 part by weight of lubricant to obtain a uniformly mixed board making raw material mixture;
(3) placing the mixed material obtained in the step (2) in a discharge hopper of an extruder, and performing melt extrusion granulation by a double-screw extruder to obtain an enhanced PC/ABS alloy material; the process parameters are as follows: the temperature of the first zone is 170-180 ℃; the temperature of the second zone is 180-2000 ℃; the temperature of the three zones is 200-220 ℃; the temperature of the fourth zone is 220-240 ℃; the temperature of the fifth area is 240-250 ℃; the temperature of the sixth area is 230-240 ℃; the temperature of the seven zones is 220-230 ℃; the temperature of the eight regions is 200-220 ℃; the temperature of the machine head is 240-250 ℃; the retention time is 3-4 min; the melt pressure is 3.0-4.0 MPa, and the vacuum degree is-0.06-0.03 MPa;
(4) and (4) adding the enhanced PC/ABS alloy material obtained in the step (3) into a plate making machine to obtain the enhanced PC/ABS alloy flame-retardant plate.
The diameter of the acidified carbon nano tube is 25nm, and the length of the acidified carbon nano tube is 20 mu m; the graphene oxide is of a monolithic layer structure, and the particle size is 6 microns.
The particle size of the nano zinc phosphate is 45 nm; the density of the PC resin was 1.35g/cm3。
The particle size of the polyaromatic ester phosphate flame retardant is 23 μm; the grain size of the silicon triazine charring synergist is 11 mu m.
Example 2
The plate making raw materials in this example are as follows: 0.093 part of carbon nano tube/graphene, 35 parts of PC resin, 8 parts of ABS resin, 1 part of polyaromatic ester phosphate flame retardant, 0.1 part of silicon triazine char-forming synergist, 0.5 part of nano zinc phosphate, 1 part of flexibilizer, 0.5 part of antioxidant and 0.5 part of lubricant are stirred and mixed, then placed in a discharge hopper of an extruder, and subjected to melt extrusion granulation by a double-screw extruder to prepare the PC/ABS composite board.
Comparative example 1
The plate-making raw materials in this comparative example were as follows: 35 parts of PC resin, 8 parts of ABS resin, 1 part of polyaromatic ester phosphate flame retardant, 0.1 part of silicon triazine char-forming synergist, 0.5 part of nano zinc phosphate, 1 part of toughening agent, 0.5 part of antioxidant and 0.5 part of lubricant are stirred and mixed, then placed in a discharge hopper of an extruder, and subjected to melt extrusion granulation by a double-screw extruder to prepare the PC/ABS composite board.
This comparative example does not incorporate carbon nanotubes/graphene introduced with a three-dimensional network structure, as compared to example 1, and is otherwise the same as example 1.
Comparative example 2
The plate-making raw materials in this comparative example were as follows: 0.00005 part of carbon fiber, 35 parts of PC resin, 8 parts of ABS resin, 1 part of polyaromatic ester phosphate flame retardant, 0.1 part of silicon triazine char-forming synergist, 0.5 part of nano zinc phosphate, 1 part of toughening agent, 0.5 part of antioxidant and 0.5 part of lubricant are stirred and mixed, then placed in a discharge hopper of an extruder, and subjected to melt extrusion granulation by a double-screw extruder to prepare the PC/ABS composite board.
Compared with example 1, the comparative example adds and introduces carbon fiber, not carbon nano tube/graphene with a three-dimensional network structure, and the rest is the same as example 1.
Comparative example 3
The plate-making raw materials in this comparative example were as follows: the PC/ABS composite board is prepared by stirring and mixing 0.00005 part of carbon nano tube/graphene material, 30 parts of PC resin, 8 parts of ABS resin, 1 part of polyaromatic ester phosphate flame retardant, 0.1 part of silicon triazine char-forming synergist, 1 part of flexibilizer, 0.5 part of antioxidant and 0.5 part of lubricant, placing the mixture into a discharge hopper of an extruder, and performing melt extrusion granulation by a double-screw extruder.
This comparative example was the same as example 1 except that nano zinc phosphate was not added as compared with example 1.
Comparative example 4
The plate-making raw materials in this comparative example were as follows: the PC/ABS composite board is prepared by stirring and mixing 0.00005 part of carbon nano tube/graphene material, 30 parts of PC resin, 8 parts of ABS resin, 1 part of polyaromatic ester phosphate flame retardant, 0.5 part of nano zinc phosphate, 1 part of toughening agent, 0.5 part of antioxidant and 0.5 part of lubricant, placing the mixture into a discharge hopper of an extruder, and performing melt extrusion granulation by a double-screw extruder.
Compared with the example 1, the comparative example does not add the silicon triazine carbon forming synergist, and the rest is the same as the example 1.
The results of the flame retardant and mechanical property tests of examples 1-2 and comparative examples 1-4 are detailed in Table 1.
Table 1: test results of examples and comparative examples
And (4) analyzing results:
(1) compared with the comparative example 1, the addition of the carbon nanotube/graphene material three-dimensional network material not only improves the tensile strength, but also greatly improves the bending strength, the bending modulus and the notch impact strength.
(2) In comparison with example 1, in the carbon fiber of comparative example 2, the carbon fiber is bonded to the matrix by chemical bonds, and the bonding property with the matrix is weak, so that the tensile strength and the notch impact strength are lost, compared with the carbon nanotube/graphene material.
(3) Compared with the comparative example 3, the addition of the nano zinc phosphate can improve the fluidity of the melt synergistically, and further ensure the dispersion effect of the three-dimensional carbon nanotube/graphene in the matrix during extrusion.
(4) Compared with the comparative example 4, the matching of the oligomeric aryl phosphate flame retardant and the silicon triazine charring agent improves the synergistic charring effect of the PC/ABS alloy material and improves the flame retardant grade.
Claims (10)
1. The preparation method of the enhanced PC/ABS alloy flame-retardant plate is characterized in that carbon nano tubes/graphene with a three-dimensional network structure is added into plate-making raw materials of the flame-retardant plate.
2. The preparation method of the reinforced PC/ABS alloy flame-retardant sheet material as claimed in claim 1, wherein the addition content of the carbon nanotubes/graphene is 0.2%.
3. The method for preparing the enhanced PC/ABS alloy flame-retardant plate according to claim 1, wherein the plate-making raw materials of the flame-retardant plate further comprise PC resin, ABS resin, nano zinc phosphate, a flame retardant, a toughening agent, an antioxidant and a lubricant.
4. The preparation method of the enhanced PC/ABS alloy flame-retardant sheet material as claimed in claim 3, wherein the sheet-making raw materials of the flame-retardant sheet material are as follows in parts by weight: 0.00001-0.1 part of carbon nano tube/graphene, 35-45 parts of PC resin, 1-20 parts of ABS resin, 0.1-6 parts of nano zinc phosphate, 1-10 parts of polyaromatic ester phosphate flame retardant, 0.1-6 parts of silicon triazine char forming synergist, 0.1-6 parts of toughening agent, 0.1-2 parts of antioxidant and 0.1-1 part of lubricant.
5. The preparation method of the enhanced PC/ABS alloy flame-retardant plate as claimed in claim 3, wherein the graphene/carbon nanotube three-dimensional hydrogel prepared from the acidified carbon nanotubes and the graphene oxide is freeze-dried to obtain the carbon nanotubes/graphene with the three-dimensional network structure; and then mixing the obtained carbon nano tube/graphene serving as a plate making raw material with other plate making raw materials such as PC resin, ABS resin, nano zinc phosphate, a flame retardant, a toughening agent, an antioxidant and a lubricant, and then placing the mixture in a plate making machine for making a plate.
6. The preparation method of the enhanced PC/ABS alloy flame-retardant plate as claimed in claim 4, which is characterized by comprising the following steps:
(1) firstly, uniformly dispersing 1 part by weight of graphene oxide in water to prepare graphene oxide hydrosol; then adding 0.1-1 part by weight of acidified carbon nano tube and 0.5-2 parts by weight of NaHSO4Stirring for 2-5 h at normal temperature, placing in an ultrasonic instrument, and carrying out ultrasonic treatment for 2-5 h under the stirring condition to obtain a uniformly mixed mixture; placing the mixture in a vacuum freeze dryer for freezing and drying for 24 hours at-60 ℃ to prepare a carbon nanotube/graphene plate-making raw material with a three-dimensional network structure;
(2) stirring and mixing 0.00001-0.1 part by weight of the carbon nano tube/graphene obtained in the step (1) with 35-45 parts by weight of PC resin, 1-20 parts by weight of ABS resin, 0.1-6 parts by weight of nano zinc phosphate, 1-10 parts by weight of polyaromatic ester phosphate flame retardant, 0.1-6 parts by weight of silicon triazine char-forming synergist, 0.1-6 parts by weight of flexibilizer, 0.1-2 parts by weight of antioxidant and 0.1-1 part by weight of lubricant to obtain a uniformly mixed board making raw material mixture;
(3) putting the mixed material obtained in the step (2) into an extruder for melt extrusion granulation to obtain an enhanced PC/ABS alloy material;
(4) and (4) adding the enhanced PC/ABS alloy material obtained in the step (3) into a plate making machine to obtain the enhanced PC/ABS alloy flame-retardant plate.
7. The preparation method of the enhanced PC/ABS alloy flame-retardant sheet material as claimed in claim 5 or 6, wherein the diameter of the acidified carbon nanotube is 2nm to 50nm, and the length is 10 μm to 50 μm; the graphene oxide is of a monolithic layer structure, and the particle size is 4-10 microns.
8. The preparation method of the enhanced PC/ABS alloy flame-retardant plate as claimed in any one of claims 3-6, wherein the particle size of the nano zinc phosphate is 45 nm; the density of the PC resin was 1.35g/cm3。
9. The preparation method of the enhanced PC/ABS alloy flame-retardant sheet material as claimed in claim 4 or 6, wherein the particle size of the polyaromatic ester phosphate flame retardant is 20 μm to 30 μm; the grain size of the silicon triazine charring synergist is 10-15 mu m.
10. The preparation method of the enhanced PC/ABS alloy flame-retardant sheet material as claimed in claim 6, wherein the melt extrusion granulation process parameters in the step (3) are as follows: the temperature of the first zone is 170-180 ℃; the temperature of the second zone is 180-2000 ℃; the temperature of the three zones is 200-220 ℃; the temperature of the fourth zone is 220-240 ℃; the temperature of the fifth area is 240-250 ℃; the temperature of the sixth area is 230-240 ℃; the temperature of the seven zones is 220-230 ℃; the temperature of the eight regions is 200-220 ℃; the temperature of the machine head is 240-250 ℃; the retention time is 3-4 min; the melt pressure is 3.0-4.0 MPa, and the vacuum degree is-0.06-0.03 MPa.
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| CN116622184A (en) * | 2023-03-10 | 2023-08-22 | 济南目嘉五金建材销售有限公司 | High-strength engineering plastic and preparation method thereof |
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| CN113757458A (en) * | 2021-09-07 | 2021-12-07 | 浙江工业大学 | Buried PC/ABS alloy pipe and preparation method thereof |
| CN113757458B (en) * | 2021-09-07 | 2022-12-30 | 浙江工业大学 | Buried PC/ABS alloy pipe and preparation method thereof |
| CN116622184A (en) * | 2023-03-10 | 2023-08-22 | 济南目嘉五金建材销售有限公司 | High-strength engineering plastic and preparation method thereof |
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