CN111234447A - Epoxidized elastomer modified waste ABS plastic and preparation method thereof - Google Patents
Epoxidized elastomer modified waste ABS plastic and preparation method thereof Download PDFInfo
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- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 title claims abstract description 28
- 239000002699 waste material Substances 0.000 title claims abstract description 17
- 229920001971 elastomer Polymers 0.000 title claims abstract description 16
- 239000000806 elastomer Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 70
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000005469 granulation Methods 0.000 claims abstract description 8
- 230000003179 granulation Effects 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims abstract description 5
- 238000001746 injection moulding Methods 0.000 claims description 19
- 239000004593 Epoxy Substances 0.000 claims description 14
- 238000001125 extrusion Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 8
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 4
- 235000019253 formic acid Nutrition 0.000 claims description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- 150000001993 dienes Chemical class 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 abstract description 10
- 239000004033 plastic Substances 0.000 abstract description 10
- 230000004048 modification Effects 0.000 abstract description 6
- 238000012986 modification Methods 0.000 abstract description 6
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 239000002861 polymer material Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 15
- 239000008187 granular material Substances 0.000 description 12
- 238000007605 air drying Methods 0.000 description 10
- 238000006731 degradation reaction Methods 0.000 description 7
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 6
- 230000006872 improvement Effects 0.000 description 6
- 239000008096 xylene Substances 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004566 building material Substances 0.000 description 3
- 125000003700 epoxy group Chemical group 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000007655 standard test method Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000002390 rotary evaporation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000003172 aldehyde group Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000006735 epoxidation reaction Methods 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 125000000864 peroxy group Chemical group O(O*)* 0.000 description 1
- 238000009473 power blending Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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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
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention belongs to the field of high polymer materials, relates to RABS plastic modification, and particularly relates to an epoxidized elastomer modified waste ABS plastic and a preparation method thereof. The material is subjected to melt blending, and the raw materials comprise, by weight, 85-97 parts of RABS and 3-15 parts of E-EPDM. The notched impact strength of the E-EPDM/RABS material provided by the application is higher than 16.0kJ/m2The tensile strength is higher than 45.0MPa, and the bending strength is higher than 50.0 MPa. The preparation method can independently recycle RABS plastic melting modification granulation, and has higher market value.
Description
Technical Field
The invention belongs to the field of high polymer materials, relates to modification of waste ABS plastics (RABS), and particularly relates to epoxidized elastomer modified waste ABS plastics and a preparation method thereof.
Background
The largest application fields of ABS resins are automobiles, electronic appliances and building materials. Many applications in the automotive field include automobile instrument panels, body outer panels, interior trim panels, steering wheels, sound insulation panels, door locks, bumpers, ventilation ducts, and the like. In the field of electronic appliances, the electronic appliances are widely applied to refrigerators, televisions, washing machines, air conditioners, computers, copiers and the like. In the aspect of building materials, ABS pipes, ABS sanitary wares and ABS decorative plates are widely applied to the building material industry. ABS is also widely used in the packaging, furniture sports and recreational, machinery and instrumentation industries.
ABS resin belongs to three-phase blend, the continuous phase is SAN, the disperse phase is PB, PB-g-SAN exists in the interface of PB phase and SAN phase, the ABS resin can age in the using process, the aging of plastics is mainly caused by degradation and crosslinking, the degradation is mainly concentrated in PB phase, the degradation of PB phase initiates the degradation of PB-g-SAN, and the degradation of PB phase is accompanied with the crosslinking of PB phase. In the degradation process of the PB phase, peroxy groups, hydroxyl groups, carbonyl groups, aldehyde groups and other polar groups are generated. The change of color in degradation oxidation process is related to the content of carbonyl, and the particle size of the dispersed phase is increased.
RABS has 5 kinds of recovery processing method at present, landfill processing, burning power generation, blending and recycling with new material ABS after recovery, cracking and utilizing raw material after recovery, melting, modifying and granulating for independent recycling after recovery. Wherein the first and second schemes are of lower recovery value and are not recommended to be adopted, and the fourth scheme is still in a laboratory research stage at present. The third solution is the confusion of the market caused by many enterprises selling RABS/ABS plastics and ABS plastics in the same plastics, which for a long time inevitably leads to consumer non-acceptance and non-acceptance. The invention recycles RABS, and then carries out melting modification granulation to be independently reused, and the product takes environmental protection as brand competitiveness and has wide market prospect.
Disclosure of Invention
The invention provides an epoxidized elastomer modified RABS plastic and a preparation method thereof, aiming at solving various defects existing in RABS recycling treatment.
The invention is realized by the following technical scheme: an epoxidized elastomer modified RABS plastic is prepared by melt blending of materials, wherein the raw materials comprise, by weight, 85-97 parts of RABS and 3-15 parts of epoxidized ethylene propylene diene monomer (E-EPDM).
As a further improvement of the technical proposal of the invention, the epoxy value of the E-EPDM is more than or equal to 0.21. Only when the epoxy value reaches a certain degree, the epoxy group and polar groups such as carboxyl, hydroxyl and the like generated in the RABS undergo chemical reaction, and broken molecules in the RABS and interfaces of a dispersed phase and a continuous phase are repaired, so that the notch impact strength of the RABS is improved. However, when the epoxy value of E-EPDM is less than 0.21, the epoxy group content is low, the epoxy group and polar groups such as carboxyl, hydroxyl and the like generated in RABS can not generate enough chemical reaction, the toughening and reinforcing effects on RABS are not obvious, and the lowest market requirement of ABS plastics can not be met.
As a further improvement of the technical scheme of the invention, the EPDM is subjected to epoxidation modification by adopting a formic acid method.
As a further improvement of the technical scheme of the invention, the conjugated diene content of the EPDM is more than 5wt%, and the ethylene content is 70%.
As a further improvement of the technical scheme of the invention, the notch impact strength of the RABS is lower than 6.0kJ/m2Tensile strength of less than 55.0MPa, bendingThe bending strength is lower than 70.0 MPa.
The invention further provides a preparation method of the epoxidized elastomer modified waste ABS plastic, which adopts the raw materials and comprises the following steps: and drying the RABS and the E-EPDM, and then carrying out melt blending, extrusion, granulation, drying and injection molding to obtain the E-EPDM/RABS modified material.
In the invention, the drying temperature before RABS and E-EPDM melt blending extrusion granulation is 60-120 ℃, and the drying time is 4-6 h.
As a further improvement of the technical scheme of the preparation method, the melt blending extrusion granulation is carried out in a double-screw extruder, and the temperatures of all sections from a feed inlet to a machine head are respectively 210 ℃, 220 ℃, 230 ℃, 245 ℃, 255 ℃, 240 ℃, 225 ℃, 215 ℃ and 205 ℃; the screw rotating speed of the double-screw extruder is 80 r/min.
As a further improvement of the technical scheme of the preparation method, the injection molding is operated in an injection molding machine, and the temperatures from one section to a sprue are respectively 220 ℃, 225 ℃, 230 ℃ and 225 ℃; the injection pressure is 35.0MPa, the pressure maintaining pressure is 45.0MPa, and the flow is 40cm2/s。
According to the epoxidized elastomer modified waste ABS plastic, the epoxidized ethylene propylene diene monomer rubber is added into RABS, the market price of RABS plastic is lower than 8000 yuan/ton, and the market price of ABS is 15000-; the epoxidized ethylene propylene diene monomer rubber has a market price of 20-30 yuan/kg, and the E-EPDM/RABS modified material with good mechanical property is prepared. Experimental results show that the notched impact strength of the E-EPDM/RABS material provided by the application can be more than 10.0kJ/m2The tensile strength is higher than 45.0MPa, and the bending strength is higher than 50.0 MPa. The preparation method can independently recycle RABS plastic melting modification granulation, and has higher market value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a Fourier infrared spectrum of EPDM and E-EPDM wherein A is EPDM and B is E-EPDM having an epoxy value of 0.21 prepared by the peroxoformic acid process.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The raw materials and apparatus used in the invention are as follows:
RABS is obtained from RABS recovered from waste household appliances, and the notch impact strength of the RABS is 5.9kJ/m2The tensile strength was 54.3MPa, and the bending strength was 68.6 MPa.
EPDM was purchased from Dongguan, poverty and plastics chemical Co., Ltd, the manufacturer was Dow chemical, the conjugated diene content was greater than 5wt%, and the ethylene content was 70%.
Preparation of E-EPDM with an epoxy value of 0.21: 600ml of xylene was added to a 1000ml flask, 200g of EPDM was added to the flask, the EPDM was dissolved in the xylene by stirring to form a solution, 9.2ml of formic acid was added thereto, and then heated in a water bath at 50 ℃ and stirred at a constant temperature. 50ml of H is added dropwise within 15min2O2And then reacting for 8 hours, pouring the solution into a separating funnel after the reaction is finished, washing the solution to be neutral by using distilled water, standing for layering and separating to obtain an E-EPDM solution, carrying out rotary evaporation on the E-EPDM solution to remove xylene, and drying by using an air drying oven at the temperature of 50 ℃ to obtain an E-EPDM solid for later use.
Preparation of E-EPDM with an epoxy value of 0.19: 600ml of xylene was added to a 1000ml flask, 200g of EPDM was added to the flask, EPDM was dissolved in xylene by stirring to form a solution, and thereto was added7.6ml of formic acid are added, which is then heated to 50 ℃ in a water bath and stirred at constant temperature. 40ml of H are added dropwise within 15min2O2And then reacting for 8 hours, pouring the solution into a separating funnel after the reaction is finished, washing the solution to be neutral by using distilled water, standing for layering and separating to obtain an E-EPDM solution, carrying out rotary evaporation on the E-EPDM solution to remove xylene, and drying by using an air drying oven at the temperature of 50 ℃ to obtain an E-EPDM solid for later use.
The twin-screw extruder was produced by Nanjing Ningping extrusion Equipment Co., Ltd, model number: SHJ-35, injection molding machine manufactured by jiangsu dada machines ltd, model number: LY-88.
The technical solution of the present invention will be described below by way of specific examples.
Example 1
RABS and E-EPDM were placed in a forced air drying cabinet and dried at 80 ℃ for 8 h. 3 parts of E-EPDM (self-made, epoxy value of 0.21) and 97 parts of dried RABS are uniformly mixed and added into a double-screw extruder, and the temperature of each section from a hopper to a machine head of the double-screw extruder is set as follows: 185 deg.C, 190 deg.C, 195 deg.C, 200 deg.C, 210 deg.C, 200 deg.C, screw rotation speed of 80r/min, and feeding speed of 2.5 Hz. The waste ABS plastic and the E-EPDM are extruded after being melted and blended in a double-screw extruder, and the extruded material obtained through extrusion is granulated to obtain the granular material. The granules were placed in a forced air drying cabinet and dried at 80 ℃ for 8 h. Pouring the dried granules into an injection molding machine, and setting the temperature of each section of the injection molding machine from a hopper to a machine head as follows: 215 ℃, 220 ℃, 225 ℃ and 215 ℃, the injection pressure is 35.0MPa, the pressure maintaining pressure is 45.0MPa, the pressure maintaining time is 15s, and the temperature of the die is room temperature. And after the injection molding is finished, obtaining the E-EPDM/RABS modified material.
Example 2
RABS and E-EPDM were placed in a forced air drying cabinet and dried at 80 ℃ for 8 h. Uniformly mixing 6 parts of E-EPDM (self-made, epoxy value of 0.21) and 94 parts of dried RABS, adding the mixture into a double-screw extruder, and setting the temperature of each section of the double-screw extruder from a hopper to a machine head as follows: 185 deg.C, 190 deg.C, 195 deg.C, 200 deg.C, 210 deg.C, 200 deg.C, screw rotation speed of 80r/min, and feeding speed of 2.5 Hz. RABS and E-EPDM are extruded out after being melted and blended in a double-screw extruder, and extruded materials obtained through extrusion are granulated to obtain granular materials. The granules were placed in a forced air drying cabinet and dried at 80 ℃ for 8 h. Pouring the dried granules into an injection molding machine, and setting the temperature of each section of the injection molding machine from a hopper to a machine head as follows: 215 ℃, 220 ℃, 225 ℃ and 215 ℃, the injection pressure is 35.0MPa, the pressure maintaining pressure is 45.0MPa, the pressure maintaining time is 15s, and the temperature of the die is room temperature. And after the injection molding is finished, obtaining the E-EPDM/RABS modified material.
In this example, the E-EPDM and RABS raw materials used were the same as in example 1.
Example 3
RABS and E-EPDM were placed in a forced air drying cabinet and dried at 80 ℃ for 8 h. Uniformly mixing 9 parts of E-EPDM (self-made, epoxy value of 0.21) and 91 parts of dried RABS, adding the mixture into a double-screw extruder, and setting the temperature of each section of the double-screw extruder from a hopper to a machine head as follows: 185 deg.C, 190 deg.C, 195 deg.C, 200 deg.C, 210 deg.C, 200 deg.C, screw rotation speed of 80r/min, and feeding speed of 2.5 Hz. RABS and E-EPDM are extruded out after being melted and blended in a double-screw extruder, and extruded materials obtained through extrusion are granulated to obtain granular materials. The granules were placed in a forced air drying cabinet and dried at 80 ℃ for 8 h. Pouring the dried granules into an injection molding machine, and setting the temperature of each section of the injection molding machine from a hopper to a machine head as follows: 215 ℃, 220 ℃, 225 ℃ and 215 ℃, the injection pressure is 35.0MPa, the pressure maintaining pressure is 45.0MPa, the pressure maintaining time is 15s, and the temperature of the die is room temperature. And after the injection molding is finished, obtaining the E-EPDM/RABS modified material.
In this example, the E-EPDM and RABS raw materials used were the same as in example 1.
Example 4
RABS and E-EPDM were placed in a forced air drying cabinet and dried at 80 ℃ for 8 h. Uniformly mixing 9 parts of E-EPDM (self-made, epoxy value of 0.19) and 91 parts of dried RABS, adding the mixture into a double-screw extruder, and setting the temperature of each section of the double-screw extruder from a hopper to a machine head as follows: 185 deg.C, 190 deg.C, 195 deg.C, 200 deg.C, 210 deg.C, 200 deg.C, screw rotation speed of 80r/min, and feeding speed of 2.5 Hz. RABS and E-EPDM are extruded out after being melted and blended in a double-screw extruder, and extruded materials obtained through extrusion are granulated to obtain granular materials. The granules were placed in a forced air drying cabinet and dried at 80 ℃ for 8 h. Pouring the dried granules into an injection molding machine, and setting the temperature of each section of the injection molding machine from a hopper to a machine head as follows: 215 ℃, 220 ℃, 225 ℃ and 215 ℃, the injection pressure is 35.0MPa, the pressure maintaining pressure is 45.0MPa, the pressure maintaining time is 15s, and the temperature of the die is room temperature. And after the injection molding is finished, obtaining the E-EPDM/RABS modified material.
In this example, the E-EPDM used was different from that of example 1, and the RABS plastic was the same as that of example 1.
And (3) detection results:
the modified materials obtained from RABS, example 1, example 2, example 3 and example 4 were examined for notch impact strength, tensile strength and flexural strength, respectively. Wherein, the notch impact strength is carried out according to a standard test method GB 1843-80; the tensile strength is carried out according to the standard test method GB/T1040-92; the flexural strength was carried out according to the standard test method GB/T9341-2000 and the test results are shown in Table 1. The E-EPDM used was tested by Fourier transform infrared spectroscopy, the results of which are shown in FIG. 1.
As can be seen from table 1, from example 1 to example 3: the E-EPDM/RABS modified material provided by the invention is superior to RABS reclaimed materials, and the toughness of the E-EPDM/RABS is improved along with the increase of the mass part of the E-EPDM. However, the E-EPDM has high cost, and the addition amount of the E-EPDM is more than 15 parts and has no market application capability in consideration of the cost. From example 4, it can be seen that: the E-EPDM/RABS modified material with the E-EPDM epoxy value of 0.21 provided by the invention is obviously better than the E-EPDM/RABS modified material with the E-EPDM epoxy value of 0.19. Therefore, in the present invention, the epoxy value of E-EPDM is preferably not less than 0.21.
Table 1: mechanical property detection results of RABS and E-EPDM/RABS modified material embodiments
| Item | RABS | Example 1 | Example 2 | Example 3 | Example 4 |
| Notched impact Strength (KJ/m)2) | 5.9 | 7.9 | 9.3 | 11.1 | 5.5 |
| Tensile Strength (MPa) | 54.3 | 51.2 | 48.1 | 45.6 | 40.8 |
| Flexural Strength (MPa) | 68.6 | 60.5 | 57.6 | 54.1 | 51.2 |
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. The epoxidized elastomer modified waste ABS plastic is characterized by being prepared by melt blending of materials, wherein the raw materials comprise the following raw materials in parts by weight:
85 to 97 portions of RABS
3-15 parts of E-EPDM.
2. The epoxidized elastomer modified waste ABS plastic according to claim 1, wherein the epoxy value of E-EPDM is greater than or equal to 0.21.
3. The epoxidized elastomer modified waste ABS plastic according to claim 1, wherein the E-EPDM is obtained by epoxidizing EPDM with formic acid method.
4. The epoxidized elastomer modified waste ABS plastic according to claim 3, wherein the conjugated diene content of the EPDM is more than 5wt%, and the ethylene content is 70%.
5. The epoxidized elastomer modified waste ABS plastic according to claim 1, wherein the RABS has a notched impact strength of less than 8.0kJ/m2The tensile strength is lower than 55.0MPa, and the bending strength is lower than 70.0 MPa.
6. A preparation method of epoxidized elastomer modified waste ABS plastic is characterized in that the raw material as claimed in any one of claims 1 to 5 is adopted, and the preparation method comprises the following steps: and drying the RABS and the E-EPDM, and then sequentially carrying out melt blending, extrusion granulation, drying and injection molding to obtain the E-EPDM/RABS modified material.
7. The method for preparing the epoxidized elastomer modified waste ABS plastic according to claim 6, wherein the melt blending extrusion granulation is performed in a twin-screw extruder, and the temperatures of the sections from one section to the head are 210 ℃, 220 ℃, 230 ℃, 245 ℃, 255 ℃, 240 ℃, 225 ℃, 215 ℃ and 205 ℃ respectively; the screw rotating speed of the double-screw extruder is 80 r/min.
8. The method for preparing the epoxidized elastomer modified waste ABS plastic according to claim 6, wherein the injection molding is performed in an injection molding machine, and the temperatures from one section to a pouring opening are 220 ℃, 225 ℃, 230 ℃ and 225 ℃ respectively; the injection pressure is 35.0MPa, the pressure maintaining pressure is 45.0MPa, and the flow is 40cm2/s。
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| CN103980652A (en) * | 2014-04-25 | 2014-08-13 | 中北大学 | Chain-extension waste and old electric appliance casing ABS plastic and preparation method thereof |
| CN110387004A (en) * | 2018-04-19 | 2019-10-29 | 北京化工大学 | A kind of epoxidized ethylene-propylene-diene mischpolymer, preparation method and elastomer |
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2020
- 2020-03-18 CN CN202010189193.5A patent/CN111234447A/en active Pending
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