CN114752150B - High-rigidity light-weight polypropylene composite material and preparation method and application thereof - Google Patents
High-rigidity light-weight polypropylene composite material and preparation method and application thereof Download PDFInfo
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- CN114752150B CN114752150B CN202210283345.7A CN202210283345A CN114752150B CN 114752150 B CN114752150 B CN 114752150B CN 202210283345 A CN202210283345 A CN 202210283345A CN 114752150 B CN114752150 B CN 114752150B
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 137
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 137
- -1 polypropylene Polymers 0.000 title claims abstract description 136
- 239000002131 composite material Substances 0.000 title claims abstract description 58
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 44
- 229920005989 resin Polymers 0.000 claims abstract description 44
- 239000011521 glass Substances 0.000 claims abstract description 33
- 239000011324 bead Substances 0.000 claims abstract description 29
- 239000007822 coupling agent Substances 0.000 claims abstract description 17
- 239000000155 melt Substances 0.000 claims abstract description 17
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 23
- 238000001125 extrusion Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 8
- 239000003963 antioxidant agent Substances 0.000 claims description 7
- 239000004611 light stabiliser Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 239000004005 microsphere Substances 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 7
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 15
- 238000012360 testing method Methods 0.000 description 7
- 239000003365 glass fiber Substances 0.000 description 6
- 239000004593 Epoxy Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000010561 standard procedure Methods 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009044 synergistic interaction Effects 0.000 description 1
- 150000007970 thio esters Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D63/00—Motor vehicles or trailers not otherwise provided for
- B62D63/02—Motor vehicles
- B62D63/04—Component parts or accessories
-
- 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
- C08L23/12—Polypropene
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a high-rigidity light-weight polypropylene composite material and a preparation method and application thereof. The polypropylene composite material provided by the invention comprises the following components in parts by weight: 100 parts of polypropylene, 10-40 parts of hollow glass beads, 0.5-2 parts of coupling agent and 0.1-4 parts of other auxiliary agents; the polypropylene comprises polypropylene resin A and polypropylene resin B, and the mass ratio is (1-2): 1, a step of; the polypropylene resin A is copolymerized polypropylene, and the melt flow rate is 20-50 g/10min; the melt flow rate of the polypropylene resin B is 60-100 g/10min. By selecting specific polypropylene resin and combining hollow glass beads and a coupling agent, the polypropylene composite material has high rigidity, low density, bending strength of more than or equal to 30MPa, bending modulus of more than or equal to 3000MPa and density of less than or equal to 0.89g/cm by utilizing the synergistic effect of the components 3 。
Description
Technical Field
The invention relates to the technical field of high polymer material modification, in particular to a high-rigidity and light-weight polypropylene composite material and a preparation method and application thereof.
Background
With the development of carbon neutralization strategies, more and more main factories are paying attention to the low-carbon environmental protection of materials, wherein one direction is the use of recycled materials in automobile industry parts, and carbon emission is reduced by recycling the recycled materials through the regeneration of carbon-based materials. Meanwhile, along with the development of energy conservation and environmental protection, the weight reduction of the automobile is also increasingly valued by a host factory.
The polypropylene (PP) material has the advantages of wide source, excellent mechanical property, fatigue resistance, yield, low price and the like, and is widely applied to various fields. The reclaimed materials are widely available, but because the reclaimed materials undergo one or more melting heat histories compared with the new materials, the molecular chains of the reclaimed materials are relatively shorter, so that the mechanical properties are deteriorated, and particularly the rigidity is poor. The regenerated polypropylene material is difficult to meet the high rigidity requirement (generally, bending strength is more than or equal to 30MPa, and bending modulus is more than or equal to 3000 MPa) in practical application after traditional modification.
The prior art reports a composite material modified by taking recycled polypropylene as a matrix, which comprises the components of recycled polypropylene, polyethylene, minerals, glass fibers and the like, and the strength and the rigidity of the recycled polypropylene are improved through the glass fibers and the minerals. However, in the composite material, the addition amount of minerals and glass fibers is more, and the density of the prepared composite material is too high to reach 1.2g/cm 3 The development goal of automobile weight reduction is counter.
Therefore, there is a need to develop a polypropylene composite material with high rigidity and light weight.
Disclosure of Invention
The invention provides a high-rigidity and light-weight polypropylene composite material for overcoming the defects of insufficient rigidity and high density in the prior art.
Another object of the present invention is to provide a method for preparing the polypropylene composite material.
It is a further object of the present invention to provide the use of the polypropylene composite material described above.
In order to solve the technical problems, the invention adopts the following technical scheme:
a high-rigidity light-weight polypropylene composite material comprises the following components in parts by weight:
100 parts of polypropylene, and the weight of the polypropylene,
10 to 40 parts of hollow glass beads,
0.5 to 2 parts of coupling agent,
0.1-4 parts of other auxiliary agents;
the polypropylene comprises polypropylene resin A and polypropylene resin B, and the mass ratio of the polypropylene to the polypropylene resin B is (1-2): 1, a step of;
the polypropylene resin A is copolymerized polypropylene, and the melt flow rate is 20-50 g/10min under the conditions of 230 ℃ and 2.16 kg; the melt flow rate of the polypropylene resin B is 60-100 g/10min under the conditions of 230 ℃ and 2.16 kg.
In the invention, the polypropylene resin A is a regenerated polypropylene material.
Alternatively, the recycled source of the polypropylene resin a may be a drum portion recycled material of a washing machine.
The method for detecting the melt flow rate of the polypropylene is GB/T3682-2018.
Polypropylene resins can be generally classified as either homo-polypropylene or co-polypropylene. In the invention, the polypropylene resin A is the copolymerized polypropylene, and the inventor researches and discovers that the copolymerization polymerization mode of the regenerated polypropylene material enables the prepared polypropylene composite material to have excellent rigidity, namely higher flexural modulus and flexural strength.
The inventor researches and discovers that the melt flow rate of the polypropylene resin A is in a proper range, so that the polypropylene composite material with high rigidity, toughness and low density can be prepared. When the melt flow rate of the polypropylene resin A is too low, the viscosity is too high, so that the hollow glass fiber is damaged due to shearing stress in the extrusion process, and when the melt flow rate is more than 20g/10min, the shearing stress on the hollow glass beads in the subsequent extrusion process can be reduced, thereby greatly avoiding the breakage of the glass beads, and realizing the weight and rigidity reducing effects of the hollow glass beads in the polypropylene system. The melt flow rate of the polypropylene resin A is not too high, and the inventor researches that the too high melt flow rate of the regenerated polypropylene can cause serious toughness cracking of the material, but the recycled and regenerated polypropylene resin new material does not have the influence. Although the invention aims to prepare the high-rigidity light-weight polypropylene composite material, in practical application, the material is still generally required to be not too hard and brittle, and the notched Izod impact strength of the material is generally required to be more than or equal to 3kJ/m 2 。
The polypropylene resin B is a new polypropylene resin material, and the new polypropylene resin material with high melt flow rate can compensate the mechanical property degradation brought by the regenerated polypropylene material, so that the mechanical property of the prepared polypropylene composite material meets the use requirement.
Preferably, the melt flow rate of the polypropylene resin A is 30-40 g/10min at 230 ℃ and 2.16 kg.
Preferably, the melt flow rate of the polypropylene resin B is 70-80 g/10min at 230 ℃ and 2.16 kg.
Preferably, the mass ratio of the polypropylene resin A to the polypropylene resin B is (1.2-1.5): 1.
preferably, the density of the hollow glass beads is 0.15-0.6 g/cm 3 。
More preferably, the density of the hollow glass beads is 0.2 to 0.5g/cm 3 。
The hollow glass beads play a role in enhancing rigidity and keeping low density in the polypropylene composite material. The inventor researches that the polypropylene composite material can have better rigidity and density under the proper density of the hollow glass beads.
When the density of the hollow glass beads is too small, although the hollow glass beads are helpful to low density of the polypropylene composite material and better in dispersibility, the hollow glass beads can bear smaller stress, are easy to break in the extrusion process, and cause lower rigidity of the polypropylene composite material. When the density of the hollow glass beads is too high, the prepared polypropylene composite material has higher rigidity, but also has higher density.
Preferably, the coupling agent is a silane coupling agent and/or a titanate coupling agent.
Optionally, the silane coupling agent is an epoxy silane coupling agent and/or an aminosilane coupling agent.
More preferably, the silane coupling agent is an epoxy silane coupling agent. The epoxy silane coupling agent is favorable for better rigidity and toughness of the polypropylene composite material.
Optionally, the other auxiliary agent can be one or more of an antioxidant, a light stabilizer or a lubricant.
Optionally, the antioxidant is one or more of hindered phenol antioxidants, phosphite antioxidants or thioester antioxidants.
Optionally, the light stabilizer is one or more of benzophenone ultraviolet absorber, benzotriazole ultraviolet absorber or hindered amine light stabilizer.
Optionally, the lubricant is one or more of erucamide, oleamide, EBS amide, PE wax or stearate.
The invention also provides a preparation method of the polypropylene composite material, which comprises the following steps:
adding polypropylene, hollow glass beads, a coupling agent and other auxiliary agents into an extruder, and carrying out melt mixing, extrusion and granulation to obtain the polypropylene composite material.
Preferably, after mixing the polypropylene, the coupling agent and the other auxiliary agents, adding the mixture to the extruder through a main feeding system of the extruder; the hollow glass beads are added to the extruder through a side feed system of the extruder.
Preferably, the extruder is a twin screw extruder.
Preferably, the extrusion temperature of the double-screw extruder is 200-220 ℃, the screw rotating speed is 300-500 r/min, and the screw length-diameter ratio is 36-48:1.
The invention also protects the application of the polypropylene composite material in preparing high-rigidity parts of automobiles.
Compared with the prior art, the invention has the beneficial effects that:
the invention develops a high-rigidity and light-weight polypropylene composite material. The polypropylene composite material prepared by selecting specific polypropylene resin and combining hollow glass beads and a coupling agent and utilizing the synergistic interaction of the components has high rigidity and low density, the bending strength is more than or equal to 30MPa, the bending modulus is more than or equal to 3000MPa, and the density is less than or equal to 0.89g/cm 3 。
Detailed Description
The invention is further described below in connection with the following detailed description.
The raw materials in examples and comparative examples are all commercially available, and are specifically as follows:
the antioxidants, lubricants and light stabilizers used in the examples and comparative examples which are parallel in the present invention are the same.
Unless specifically stated otherwise, the reagents, methods and apparatus employed in the present invention are those conventional in the art.
Examples 1 to 19
Examples 1-19 respectively provide a polypropylene composite material, the component content is shown in table 1, and the preparation method is as follows:
polypropylene, coupling agent and other additives were mixed according to table 1 and fed to a twin screw extruder via the main feed system of the twin screw extruder; the hollow glass beads are added into the double-screw extruder through a side feeding system of the double-screw extruder;
the polypropylene composite material is obtained through melt mixing, extrusion and granulation; wherein the extrusion temperature of the double-screw extruder is 200-220 ℃, the screw rotating speed is 300r/min, and the length-diameter ratio of the screw is 40:1.
Table 1 component content (parts by weight) of Polypropylene composite materials of examples 1 to 19
Comparative examples 1 to 7
Comparative examples 1 to 7 respectively provide a polypropylene composite material, the component contents are shown in Table 2, and the preparation method is as follows:
polypropylene, coupling agent and other additives were mixed according to table 2 and fed to a twin screw extruder via the main feed system of the twin screw extruder; the hollow glass beads (or glass fibers and solid glass beads) are added into a double-screw extruder through a side feeding system of the double-screw extruder;
the polypropylene composite material is obtained through melt mixing, extrusion and granulation; wherein the extrusion temperature of the double-screw extruder is 200-220 ℃, the screw rotating speed is 300r/min, and the length-diameter ratio of the screw is 40:1.
Table 2 comparative examples 1 to 7 component contents (parts by weight) of the polypropylene composite materials
Performance testing
The polypropylene composite materials prepared in the above examples and comparative examples were subjected to performance testing by the following specific methods:
flexural strength: detecting according to an ISO178-2019 standard method;
flexural modulus: detecting according to an ISO178-2019 standard method;
density: detecting according to an ISO1183-2019 standard method;
cantilever arm notched impact strength: the detection is carried out according to the ISO180-2019 standard method.
The test results of examples 1 to 19 are shown in Table 3, and the test results of comparative examples 1 to 7 are shown in Table 4.
TABLE 3 test results for examples 1-19
According to the test results of Table 3, the polypropylene composite material prepared by each embodiment of the invention has excellent mechanical properties, high rigidity, proper toughness and bending strengthNot less than 30MPa, flexural modulus not less than 3000MPa, and notch impact strength of cantilever arm not less than 3kJ/m 2 The method comprises the steps of carrying out a first treatment on the surface of the And the density is lower and less than or equal to 0.89g/cm 3 。
From examples 1 to 4, wherein the mechanical properties of examples 2 and 3 are relatively superior, the mass ratio of polypropylene resin A to polypropylene resin B in polypropylene is (1 to 2): 1 is more preferably (1.2 to 1.5): 1.
the polypropylene composite materials prepared in examples 1, 10 to 12, example 10 and example 12 are relatively low in flexural strength and flexural modulus, i.e., relatively poor in material rigidity, and therefore the melt flow rate of the polypropylene resin A is preferably 30 to 40g/10min at 230℃under 2.16 kg.
From examples 1 and 13 to 14, the melt flow rate of the polypropylene resin A is 70 to 80g/10min at 230 ℃ and 2.16kg, and the mechanical properties of the prepared polypropylene composite material are relatively better.
From examples 1 and 15-17, it can be seen that the density of the different hollow glass microspheres affects the mechanical properties and density of the polypropylene composite. In example 16, the hollow glass beads had a low self-density and were easily broken during extrusion, and the resulting polypropylene composite had a non-minimum density and slightly inferior rigidity. In example 17, the hollow glass microspheres had a higher self-density, which affected the density of the polypropylene composite material. Therefore, the density of the hollow glass beads is preferably 0.2 to 0.5g/cm 3 。
According to examples 1, 18 and 19, when the coupling agent is an epoxy silane coupling agent, the prepared polypropylene composite material has better rigidity and toughness.
Table 4 test results of comparative examples 1 to 7
In comparative example 1, the polypropylene composite material has poor rigidity due to the excessive amount of the polypropylene resin A, namely, the excessive amount of the regenerated polypropylene, which exceeds the technical scheme range of the invention.
In comparative example 2, the amount of hollow glass beads was too small, and improvement in rigidity was limited.
In comparative example 3, the hollow glass beads were replaced with non-hollow glass beads, resulting in an excessively high density of the polypropylene composite. The hollow glass beads in comparative example 4 are replaced by glass fibers, so that the prepared polypropylene composite material has too high density, and the rigidity and toughness of the material cannot meet the requirements of the invention.
In comparative example 5, the melt flow rate of the polypropylene resin a was too low, the hollow glass beads were broken by shear stress during extrusion, and the prepared polypropylene composite material was high in density and poor in rigidity. In comparative example 6, the polypropylene resin A had a too high melt flow rate, and the regenerated polypropylene material having a too high melt flow rate caused severe deterioration in toughness of the polypropylene composite, and the notched impact strength of the cantilever beam was only 2kJ/m 2 。
In comparative example 7, the polypropylene resin B was not used, i.e., the polypropylene was all the polypropylene resin A, and the mechanical properties of the resulting polypropylene composite material were poor, and particularly the notched impact strength of the cantilever beam was only 2.2kJ/m 2 。
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (9)
1. The high-rigidity light-weight polypropylene composite material is characterized by comprising the following components in parts by weight:
100 parts of polypropylene, and the weight of the polypropylene,
20 to 40 parts of hollow glass beads,
0.5 to 2 parts of coupling agent,
0.1-4 parts of other auxiliary agents;
the polypropylene comprises polypropylene resin A and polypropylene resin B, and the mass ratio of the polypropylene to the polypropylene resin B is (1-2): 1, a step of;
the polypropylene resin A is copolymerized polypropylene, the melt flow rate is 30-40 g/10min under the conditions of 230 ℃ and 2.16kg, and the polypropylene resin A is regenerated polypropylene material; the melt flow rate of the polypropylene resin B is 60-100 g/10min under the conditions of 230 ℃ and 2.16 kg.
2. The high-rigidity lightweight polypropylene composite material as claimed in claim 1, wherein the melt flow rate of the polypropylene resin B is 70 to 80g/10min at 230 ℃ under 2.16 kg.
3. The high-rigidity and light-weight polypropylene composite material according to claim 1, wherein the mass ratio of the polypropylene resin a to the polypropylene resin B is (1.2 to 1.5): 1.
4. the high-rigidity lightweight polypropylene composite material according to claim 1, wherein the hollow glass microsphere density is 0.2-0.5 g/cm 3 。
5. The high-rigidity lightweight polypropylene composite material according to claim 1, wherein the coupling agent is a silane coupling agent and/or a titanate coupling agent.
6. The high-rigidity and light-weight polypropylene composite material according to claim 1, wherein the other auxiliary agent is one or more of an antioxidant, a light stabilizer and a lubricant.
7. The method for producing a high-rigidity and lightweight polypropylene composite material according to any one of claims 1 to 6, comprising the steps of:
adding polypropylene, hollow glass beads, a coupling agent and other auxiliary agents into an extruder, and carrying out melt mixing, extrusion and granulation to obtain the polypropylene composite material.
8. The method of claim 7, wherein the polypropylene, coupling agent and other additives are mixed and fed to the extruder via a main feeding system; the hollow glass microspheres are added to the extruder via a side feed system.
9. Use of the high-rigidity lightweight polypropylene composite material according to any one of claims 1 to 6 for the preparation of high-rigidity parts of automobiles.
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| CN115304858A (en) * | 2022-08-11 | 2022-11-08 | 安徽理工大学 | Light high-modulus polypropylene composite material and preparation method thereof |
| CN115895110B (en) * | 2022-11-09 | 2023-09-12 | 金发科技股份有限公司 | Polypropylene composition and preparation method and application thereof |
| CN115947996A (en) * | 2022-12-30 | 2023-04-11 | 青岛国恩科技股份有限公司 | Glass bead polypropylene composite material with low breakage rate and low density and preparation method thereof |
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| CN101376728A (en) * | 2008-09-28 | 2009-03-04 | 深圳市科聚新材料有限公司 | Reinforced polypropylene composite material and preparation thereof |
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| CN108440846A (en) * | 2018-03-27 | 2018-08-24 | 昆山禾振瑞新复合材料有限公司 | A kind of automotive light weight technology polypropylene material |
| CN113845727A (en) * | 2021-10-25 | 2021-12-28 | 成都金发科技新材料有限公司 | High-rigidity high-thermal-aging-resistance polypropylene composite material and preparation method thereof |
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