CN113583349A - Environment-friendly polypropylene composite material and preparation method and application thereof - Google Patents
Environment-friendly polypropylene composite material and preparation method and application thereof Download PDFInfo
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 51
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 51
- -1 polypropylene Polymers 0.000 title claims abstract description 50
- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 50
- 239000004626 polylactic acid Substances 0.000 claims abstract description 50
- 238000002156 mixing Methods 0.000 claims abstract description 48
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 229920006124 polyolefin elastomer Polymers 0.000 claims abstract description 13
- 239000004611 light stabiliser Substances 0.000 claims abstract description 12
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 11
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 10
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000314 lubricant Substances 0.000 claims abstract description 10
- 230000003678 scratch resistant effect Effects 0.000 claims abstract description 10
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 13
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 3
- LRWZZZWJMFNZIK-UHFFFAOYSA-N 2-chloro-3-methyloxirane Chemical compound CC1OC1Cl LRWZZZWJMFNZIK-UHFFFAOYSA-N 0.000 claims description 2
- 229920002943 EPDM rubber Polymers 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 229920001903 high density polyethylene Polymers 0.000 claims description 2
- 239000004700 high-density polyethylene Substances 0.000 claims description 2
- 229920001684 low density polyethylene Polymers 0.000 claims description 2
- 239000004702 low-density polyethylene Substances 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 150000007970 thio esters Chemical class 0.000 claims description 2
- 150000008065 acid anhydrides Chemical class 0.000 claims 1
- 150000002989 phenols Chemical class 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000001746 injection moulding Methods 0.000 abstract description 4
- 241000282376 Panthera tigris Species 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 11
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- 239000013022 formulation composition Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
-
- 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
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses an environment-friendly polypropylene composite material and a preparation method and application thereof, wherein the environment-friendly polypropylene composite material is prepared from 20-40% of polypropylene, 20-30% of modified polylactic acid, 5-10% of polyolefin elastomer, 5-10% of compatilizer, 10-30% of talcum powder, 0.2-0.6% of antioxidant, 0.4-1% of light stabilizer, 1-4% of scratch-resistant agent, 0.2-0.6% of lubricant and 1-3% of toner in percentage by weight, wherein the modified polylactic acid is prepared by blending and extruding polylactic acid and end-capping agent. The polypropylene composite material has good thermal stability and environmental protection characteristic, excellent injection molding performance, excellent appearance of injection molded parts, no defects of tiger skin lines, gas marks and the like, and can be widely used for internal and external decorative parts of automobiles.
Description
Technical Field
The invention belongs to the technical field of modification of high polymer materials, and particularly relates to an environment-friendly polypropylene composite material and a preparation method and application thereof.
Background
With the development of the automobile industry, light weight, safety, environmental protection and energy conservation become the necessary way for the industry adjustment. The bio-based plastic has the advantages of environmental protection, environment-friendly processing process, wide raw material sources, low odor and the like, has great application potential in the automobile industry, but the application of the current environment-friendly plastic in the automobile industry is limited due to the defects of poor heat resistance, uncontrollable degradability and the like, so the bio-based plastic needs to be modified.
At present, many research achievements related to bio-based polypropylene materials are available, for example, chinese patent application with publication number CN106883510A discloses a polylactic acid-polypropylene composite material, and a preparation method and an application thereof. However, the raw materials obtained by the scheme in a blending and homogenizing mode have poor dispersion effect and large performance fluctuation, and appearance defects are easy to appear in the injection molding process. In addition, the composite material also has the defects of poor heat resistance, uncontrollable degradability and the like.
Disclosure of Invention
In view of the above, the invention needs to provide an environment-friendly polypropylene composite material, and a preparation method and an application thereof, and the modified polylactic acid is added into a polypropylene system, so that the obtained polypropylene composite material has good thermal stability and environmental protection, excellent injection molding performance, excellent appearance of injection molded parts, no defects such as tiger skin lines and gas marks, and can be widely used for interior and exterior trim parts of automobiles.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an environment-friendly polypropylene composite material which is prepared from 20-40% of polypropylene, 20-30% of modified polylactic acid, 5-10% of polyolefin elastomer, 5-10% of compatilizer, 10-30% of talcum powder, 0.2-0.6% of antioxidant, 0.4-1% of light stabilizer, 1-4% of scratch-resistant agent, 0.2-0.6% of lubricant and 1-3% of toner in percentage by weight, wherein the modified polylactic acid is prepared by blending and extruding polylactic acid and end-capping agent, and the end-capping agent is maleic anhydride and epoxy chloropropane.
According to the invention, the molecular chain segment of the polylactic acid is terminated by the end-capping agent to obtain the modified polylactic acid, the modified polylactic acid is added into the polypropylene, so that the thermal stability of the polylactic acid can be improved, the problem of uncontrollable degradation is reduced, the appearance between injection molding is excellent, and the defects of tiger skin lines, gas marks and the like are avoided, so that the modified polylactic acid can be widely applied to internal and external decorative parts of automobiles.
Further, the polypropylene used as the matrix resin in the present invention is not particularly limited in kind, and any polypropylene that is conventional in the art may be used, and preferably, in some embodiments of the present invention, the polypropylene is selected from at least one of a co-polypropylene and a high impact polypropylene, and the melt index of the co-polypropylene is 15 to 35g/10min at 230 ℃ and 2.16 kg.
Further, the polyolefin elastomer, the auxiliary agent and the like in the present invention are not particularly limited, and in some specific embodiments of the present invention, the polyolefin elastomer is at least one selected from POE, EPDM, HDPE and LDPE;
the density of the polyolefin elastomer is 0.88-0.90 g/cm3And the melt index is 5-20 g/10min under the conditions of 230 ℃ and 2.16 kg.
The compatilizer is selected from epoxy compatilizers, carboxylic acids and anhydride compatilizers.
The mesh number of the talcum powder is 1000-5000 meshes.
The antioxidant is selected from at least one of hindered phenol, thioester and phosphite antioxidant;
the light stabilizer is selected from hindered amine light stabilizers.
The scratch-resistant agent is selected from at least one of erucamide and silicone.
The lubricant is selected from at least one of polyethylene wax, stearate, ethylene bis stearamide and grafted ethylene bis stearamide.
It is to be understood that the selection of the above auxiliaries and the like is not limited to the above ones, and is conventional in the art.
Further, the preparation method of the modified polylactic acid specifically comprises the following steps: mixing polylactic acid, maleic anhydride and epichlorohydrin according to a mass ratio (92-97): (1-4): and (2-4) after uniformly mixing, adding the mixture into an internal mixing extruder, and carrying out internal mixing extrusion, wherein the internal mixing temperature is 140-160 ℃, the screw rotation speed is 450-550 r/min, and the modified polylactic acid is obtained after internal mixing for 10-20 min. In the banburying extrusion process, the end capping agent and the polylactic acid are subjected to chemical reaction, so that the polylactic acid is subjected to chemical end capping, and the modification of the polylactic acid is realized.
The invention also provides a preparation method of the environment-friendly polypropylene composite material, which is characterized by comprising the following steps:
fully mixing polypropylene, modified polylactic acid, polyolefin elastomer, compatilizer, talcum powder, antioxidant, light stabilizer, scratch-resistant agent, lubricant and toner according to a ratio to obtain a uniform mixed material; it is understood that the purpose of thorough mixing is to mix uniformly, so the mixing manner, parameters and the like are not particularly limited as long as the purpose of uniform mixing can be achieved, and in some specific embodiments of the present invention, the respective additives are added to a high-speed mixer and mixed for 5 to 10min at a high speed.
And adding the mixed material into a double-screw extruder, and melting, extruding, granulating and drying to obtain the environment-friendly polypropylene composite material. The processing parameters of the double-screw extruder are not particularly limited, and can be adjusted according to different matrix resins and additives, in some specific embodiments of the invention, the temperature of a cylinder of the double-screw extruder is 180-200 ℃, the rotation speed of a screw is 300-500 r/min, the vacuum degree is-0.04-0.1 MPa, the drying temperature is 85 +/-5 ℃, and the time is 2-4 h.
Compared with the prior art, the invention has the following beneficial effects:
the environment-friendly polypropylene composite material prepared by the invention has excellent mechanical property and thermal stability, and can meet the performance requirements of automobile host factories.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the specific embodiments illustrated. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Examples 1 to 3
Adding polypropylene, modified polylactic acid, conventional polylactic acid, compatilizer, polyolefin elastomer, talcum powder, antioxidant, light stabilizer, scratch-resistant agent, lubricant and toner into a high-speed mixing mill according to the proportion in the table 1, and mixing at high speed for 5-10 minutes;
and adding the mixed materials into a double-screw extruder through a main feed for melting, and extruding and granulating. Wherein the temperature of the charging barrel is 180-200 ℃, the rotating speed of the screw is 300-500 r/min, and the vacuum degree is as follows: -0.04 to 0.1 MPa;
and (3) putting the obtained material into a drying box, and drying at the temperature of 85 +/-5 ℃ for 2-4 hours to obtain the modified polypropylene composite material.
The preparation method of the modified polylactic acid in the table 1 comprises the following steps: uniformly mixing polylactic acid, maleic anhydride and epichlorohydrin according to a mass ratio of 95:2:3, adding the mixture into an internal mixing extruder, and carrying out internal mixing extrusion, wherein the internal mixing temperature is 150 ℃, the screw rotation speed is 500r/min, and the internal mixing is carried out for 15min to obtain the modified polylactic acid.
TABLE 1 Components and compounding ratios (% by weight) of the environmentally friendly polypropylene composite materials in examples 1 to 3 and comparative example 1
Comparative example 2
Compared with the example 2, the modified polylactic acid in the comparative example only adopts maleic anhydride end-capped polylactic acid, wherein the addition amount of the maleic anhydride is equal to the sum of the addition amounts of the maleic anhydride and the epichlorohydrin in the example 2, and the rest is the same as the example 2.
Comparative example 3
Compared with the example 2, the modified polylactic acid in the comparative example only adopts the epichlorohydrin-terminated polylactic acid, wherein the addition amount of the epichlorohydrin is equal to the sum of the addition amounts of the maleic anhydride and the epichlorohydrin in the example 2, and the rest is the same as that in the example 2.
TABLE 2 Performance test results of the environmentally friendly polypropylene composites in examples 1 to 3 and comparative examples 1 to 3
From examples 1-3, it can be seen that the polypropylene composite material prepared by the properties of the modified polypropylene composite material can meet the performance requirements of automobile host plants. Meanwhile, the comparative example 1 is a modified material added with the conventional polylactic acid, and has obvious differences in mechanical properties and thermal stability compared with the examples 1 to 3. According to the optimal consideration of cost, the embodiment 1 and the embodiment 2 have good thermal stability while meeting the performance requirements of the automobile host factory, and belong to a better scheme. Meanwhile, as can be seen from the test results of the embodiment 2, the comparative example 2 and the comparative example 3, most of the mechanical properties of the embodiment 2 are obviously better than those of the composite materials of the comparative example 2 and the comparative example 3, and the thermal stability is also improved, which indicates that the technical effect of the invention is realized by modifying the polylactic acid through the maleic anhydride and the epichlorohydrin together.
Examples 4 to 6
Adding polypropylene, modified polylactic acid, conventional polylactic acid, compatilizer, polyolefin elastomer, talcum powder, antioxidant, light stabilizer, scratch-resistant agent, lubricant and toner into a high-speed mixing mill according to the proportion in the table 3, and mixing at high speed for 5-10 minutes;
and adding the mixed materials into a double-screw extruder through a main feed for melting, and extruding and granulating. Wherein the temperature of the charging barrel is 180-200 ℃, the rotating speed of the screw is 300-500 r/min, and the vacuum degree is as follows: -0.04 to 0.1 MPa;
and (3) putting the obtained material into a drying box, and drying at the temperature of 85 +/-5 ℃ for 2-4 hours to obtain the modified polypropylene composite material.
TABLE 3 Components and compounding ratios (% by weight) of the environmentally friendly polypropylene composite materials in examples 4 to 6
| Formulation composition | Example 4 | Example 5 | Example 6 |
| Polypropylene copolymer | 20 | 40 | 35 |
| Modified polylactic acid | 30 | 20 | 30 |
| Polyolefin elastomer POE | 7 | 5 | 10 |
| Talcum powder | 30 | 16 | 10 |
| Compatilizer (CA100) | 8 | 10 | 10 |
| Antioxidant 1010 | 0.2 | 0.6 | 0.5 |
| Light stabilizer 3808PP5 | 0.6 | 1 | 0.4 |
| Scratch-resistant agent (Silicone master batch) | 2 | 4 | 1 |
| Lubricant (calcium stearate) | 0.2 | 0.4 | 0.6 |
| Toner powder | 2 | 3 | 2.5 |
The modified polylactic acid in example 4 in table 3 was prepared as follows: mixing polylactic acid, maleic anhydride and epichlorohydrin according to a mass ratio of 92: 4: 4, uniformly mixing, adding the mixture into an internal mixing extruder, and carrying out internal mixing extrusion, wherein the internal mixing temperature is 140 ℃, the screw rotating speed is 450r/min, and the modified polylactic acid is obtained after internal mixing for 20 min.
The modified polylactic acid in example 5 was prepared as follows: mixing polylactic acid, maleic anhydride and epichlorohydrin according to a mass ratio of 97: 1: 2, uniformly mixing, adding the mixture into an internal mixing extruder, and carrying out internal mixing extrusion, wherein the internal mixing temperature is 160 ℃, the screw rotating speed is 550r/min, and the modified polylactic acid is obtained after internal mixing for 10 min.
The modified polylactic acid in example 6 was prepared as follows: mixing polylactic acid, maleic anhydride and epichlorohydrin according to a mass ratio of 95: 3: 2, uniformly mixing, adding the mixture into an internal mixing extruder, and carrying out internal mixing extrusion, wherein the internal mixing temperature is 160 ℃, the screw rotating speed is 550r/min, and the modified polylactic acid is obtained after internal mixing for 10 min.
On the basis of the examples 1 to 3, the preparation of the modified polylactic acid, the proportion of each component and the raw material components in the composite material are properly expanded as shown in table 3, and the same test as that of the composite material in table 1 is carried out, so that the obtained environment-friendly polypropylene composite material has excellent mechanical property and thermal stability, and meets the performance requirements of automobile host plants.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The environment-friendly polypropylene composite material is characterized by being prepared from 20-40% of polypropylene, 20-30% of modified polylactic acid, 5-10% of polyolefin elastomer, 5-10% of compatilizer, 10-30% of talcum powder, 0.2-0.6% of antioxidant, 0.4-1% of light stabilizer, 1-4% of scratch-resistant agent, 0.2-0.6% of lubricant and 1-3% of toner in percentage by weight, wherein the modified polylactic acid is prepared by blending and extruding polylactic acid and end-capping agent, and the end-capping agent is maleic anhydride and epoxy chloropropane.
2. The environment-friendly polypropylene composite material according to claim 1, wherein the polypropylene is one selected from a co-polypropylene, and the co-polypropylene has a melt index of 15 to 35g/10min at 230 ℃ and 2.16 kg.
3. The environmentally friendly polypropylene composite of claim 1, wherein the polyolefin elastomer is selected from at least one of POE, EPDM, HDPE, LDPE;
the density of the polyolefin elastomer is 0.88-0.90 g/cm3And the melt index is 5-20 g/10min under the conditions of 230 ℃ and 2.16 kg.
4. The environment-friendly polypropylene composite according to claim 1, wherein the compatibilizer is at least one selected from the group consisting of epoxy compatibilizers, carboxylic compatibilizers, and acid anhydride compatibilizers.
5. The environment-friendly polypropylene composite material of claim 1, wherein the talc powder has a mesh size of 1000 to 5000 mesh.
6. The environmentally friendly polypropylene composite of claim 1, wherein the antioxidant is selected from at least one of hindered phenols, thioesters, and phosphite antioxidants;
the light stabilizer is selected from hindered amine light stabilizers.
7. The environmentally friendly polypropylene composite of claim 1, wherein the scratch resistant agent is at least one selected from erucamides and silicones.
8. The environment-friendly polypropylene composite according to claim 1, wherein the lubricant is at least one selected from the group consisting of polyethylene wax, stearate, ethylene bis stearamide, and grafted ethylene bis stearamide.
9. The environment-friendly polypropylene composite material according to claim 1, wherein the preparation method of the modified polylactic acid comprises the following specific steps: mixing polylactic acid, maleic anhydride and epichlorohydrin according to a mass ratio (92-97): (1-4): and (2-4) after uniformly mixing, adding the mixture into an internal mixing extruder, and carrying out internal mixing extrusion, wherein the internal mixing temperature is 140-160 ℃, the screw rotation speed is 450-550 r/min, and the modified polylactic acid is obtained after internal mixing for 10-20 min.
10. A method for preparing the environmentally friendly polypropylene composite of any one of claims 1 to 9, comprising the steps of:
fully mixing polypropylene, modified polylactic acid, polyolefin elastomer, compatilizer, talcum powder, antioxidant, light stabilizer, scratch-resistant agent, lubricant and toner according to a ratio to obtain a uniform mixed material;
and adding the mixed material into a double-screw extruder, and melting, extruding, granulating and drying to obtain the environment-friendly polypropylene composite material.
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| CN202110540395.4A CN113248833A (en) | 2021-05-18 | 2021-05-18 | Degradable polypropylene composite material and preparation method and application thereof |
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| CN114031841B (en) * | 2021-12-24 | 2023-02-10 | 苏州瑞高新材料有限公司 | Novel weakening-blasting-free TPO instrument board material and preparation method thereof |
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