CN112708210B - Polypropylene composition and preparation method thereof - Google Patents

Polypropylene composition and preparation method thereof Download PDF

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Publication number
CN112708210B
CN112708210B CN202011604665.5A CN202011604665A CN112708210B CN 112708210 B CN112708210 B CN 112708210B CN 202011604665 A CN202011604665 A CN 202011604665A CN 112708210 B CN112708210 B CN 112708210B
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polypropylene
polypropylene composition
composition according
graphene
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CN112708210A (en
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聂鑫
黄险波
叶南飚
雷亮
吴国峰
杨波
俞飞
马金成
陈嘉杰
胡佳旭
李烨
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Kingfa Science and Technology Co Ltd
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Kingfa Science and Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02Compositions 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
    • C08L23/10Homopolymers or copolymers of propene
    • C08L23/14Copolymers of propene
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/08Materials not undergoing a change of physical state when used
    • C09K5/14Solid materials, e.g. powdery or granular
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend

Abstract

The invention provides a polypropylene composition and a preparation method thereof, wherein the polypropylene composition comprises the following components in parts by weight: polypropylene resin: 70-99.8 parts of a toughening agent: 0-30 parts of graphene: 1-5 parts of a compatilizer: 2-7 parts of an auxiliary agent: 0.2-2 parts of graphene with high heat conductivity coefficient is added into a polypropylene material, and a compatilizer SEBS grafted maleic anhydride is added to improve the dispersion of the graphene in the polypropylene material, so that the heat conductivity of the polypropylene material is obviously improved, and the polypropylene composition with simple preparation and high heat conductivity is obtained and can be used for preparing shell plastic parts of parts needing heat dissipation of automobiles.

Description

Polypropylene composition and preparation method thereof
Technical Field
The invention belongs to the technical field of high polymer materials, and relates to a polypropylene composition and a preparation method thereof.
Background
Polypropylene (PP) has the advantages of low density, easy processing, excellent mechanical properties, etc., and has been widely used in the fields of automobile industry, home appliances and machinery. In the automotive industry, polypropylene is mainly used for interior and exterior automotive trim parts. There are many electronic components on the car circuit system, and its operating time can produce very big heat when long, leads to electronic component temperature rise, and this can reduce electronic component's work efficiency and life. And the housing outside these parts is much PP plastic. If the PP plastic has higher heat conductivity coefficient, the PP plastic has good heat conduction effect, and dissipates heat, so that the temperature of electronic parts can be obviously reduced, and the working efficiency and the service life of the electronic parts are facilitated.
Many studies have been made to improve the heat-conductive property of polypropylene materials. The thermal conductivity of the PP material is often improved by filling thermal conductive fillers such as boron nitride, aluminum nitride, magnesium oxide, and carbon powder. As disclosed in the patent publication: CN201910509565.5 discloses a polypropylene composite material filled with a core-shell structure heat-conducting filler, wherein two heat-conducting fillers, namely amino-modified boron nitride and epoxy-modified aluminum oxide, are connected together through chemical bonds to form the core-shell structure heat-conducting filler; the flaky amino modified boron nitride with a larger heat conductivity coefficient is coated on the surface of the spherical epoxy modified aluminum oxide with a larger volume, so that the heat-conducting fillers with a higher heat conductivity coefficient are more easily contacted with each other, and a heat-conducting network is formed. However, the method has high content of the heat-conducting filler, so that the mechanical property of the heat-conducting filler is reduced, and the heat-conducting coefficient is not high.
Therefore, there is still a need in the art to develop a polypropylene material with simple preparation method and high thermal conductivity for use in automotive plastic parts.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a polypropylene composition which is simple to prepare and has high thermal conductivity.
Another object of the present invention is to provide a method for preparing the polypropylene composition with simple preparation method and high thermal conductivity.
According to the research of the invention, the graphene is added into the polypropylene material, the graphene is uniformly dispersed in the polypropylene resin, the heat conductivity coefficient of the polypropylene material is obviously improved, the graphene has very good heat conduction performance, the heat conductivity coefficient of pure defect-free single-layer graphene is as high as 5300W/mK, the graphene is a carbon material with the highest heat conductivity coefficient, the carbon material is higher than that of a single-wall carbon nanotube (3500W/mK) and a multi-wall carbon nanotube (3000W/mK), and when the graphene is used as a carrier, the heat conductivity coefficient can also reach 600W/mK, so that the heat conductivity coefficient of the polypropylene material can be obviously improved by adding the graphene into the polypropylene.
In order to achieve the above-mentioned effects, the present invention provides the following technical solutions:
a polypropylene composition comprises the following components in parts by weight: polypropylene resin: 70-99.8 parts of a toughening agent: 0-30 parts of graphene: 1-5 parts of a compatilizer: 2-7 parts of an auxiliary agent: 0.2-2 parts.
Preferably, the polypropylene resin is one or a mixture of two of homo-polypropylene resin and co-polypropylene resin.
Preferably, the toughening agent is one or a mixture of two of ethylene-butene copolymer, ethylene-octene copolymer and styrene copolymer elastomer.
Preferably, the auxiliary agents are antioxidants and light stabilizers.
Preferably, the antioxidant is hindered phenol and phosphite antioxidant, and specifically can be one or a mixture of two or more of 1010, 1076, 3114, 168 and PEP-36.
Preferably, the light stabilizer is a hindered amine light stabilizer, and specifically can be one or a mixture of two or more of UV-3808PP5, LA-402XP and LA-402 AF.
Preferably, the compatilizer is SEBS grafted maleic anhydride, and SEBS in the SEBS grafted maleic anhydride contains benzene rings.
A method for preparing a polypropylene composition comprises the following steps,
s1, uniformly mixing the polypropylene resin, the toughening agent, the graphene, the compatilizer and the auxiliary agent;
and S2, adding the material mixed in the step S1 into a double-screw extruder, and carrying out melt mixing extrusion to obtain the simple and high-heat-conductivity polypropylene material.
Wherein, in the operation step of S2: the melting and mixing temperature is 200-210 ℃, and the screw rotating speed of the double-screw extruder is 350-450 rpm.
The invention provides a polypropylene composition and a preparation method thereof, and the polypropylene composition has the following beneficial effects:
1. according to the invention, graphene with high heat conductivity coefficient is added into the polypropylene material, and the compatilizer SEBS grafted maleic anhydride is added to improve the dispersion of the graphene in the polypropylene material, so that the heat conductivity of the polypropylene material is obviously improved, and the polypropylene composition with simple preparation and high heat conductivity is obtained.
2. The polypropylene composition prepared by the invention can be used for preparing shell plastic parts of parts needing heat dissipation of automobiles.
Detailed Description
The present invention is further illustrated by the following specific examples, which are, however, not intended to limit the scope of the invention.
Remarking: the sources of the raw materials used in the present invention are as follows, but are not limited by the following raw materials.
Polypropylene resin: according to ISO1133-2-2011 standard, the melt mass flow rate is 30g/10min at 230 ℃ and under the load of 2.16kg, and the polypropylene copolymer is prepared from Chinese seashell;
a toughening agent: according to ISO1133-2-2011 standard, the melt mass flow rate is 1.0g/10min at 1900 ℃ and under the load of 2.16kg, Dow chemical Co., Ltd;
graphene: nanjing Xiancheng nanometer;
a compatilizer: american kraton;
antioxidant: antioxidant 1010 and antioxidant 168, double bond chemical engineering;
light stabilizer: UV-3808, BASF.
Examples 1 to 7
The index steps of each example are as follows:
according to the weight parts of the components in the embodiment, the polypropylene resin, the toughening agent, the graphene, the compatilizer and the auxiliary agent are uniformly mixed, then the mixture is added into a double-screw extruder to be subjected to melt mixing, the melt mixing temperature is 200-210 ℃, the screw rotating speed is 350-450 rpm, and the mixture is extruded and granulated to obtain the polypropylene composition with simple preparation and high heat conductivity. The formulations of the components of examples 1 to 7 and comparative examples 1 to 6 are shown in Table 1.
The performance indexes of examples 1 to 7 and comparative examples 1 to 6 are shown in Table 2.
TABLE 1 proportions (in parts by weight) of the components in examples 1 to 7 and comparative examples 1 to 6
Table 2 results of each performance test in examples 1 to 7 and comparative examples 1 to 6
The performance test method comprises the following steps:
thermal conductivity: the thermal conductivity of the polypropylene composition was measured using a thermal constant analyzer with a probe radius of 6.403mm, a test temperature of 25 ℃ and a template size of 40X (3. + -. 0.2) mm.
From the test results in table 2, it can be derived: the polypropylene composition adopting 1-5 parts of graphene and 2-7 parts of compatilizer has the characteristics of simple preparation and high thermal conductivity. When the content of the graphene is 3 parts and the content of the compatilizer is 5 parts, the thermal conductivity of the obtained polypropylene composition is highest.
Due to the fact that the graphene has a high heat conductivity coefficient, the graphene is added into the polypropylene material, and the compatilizer SEBS grafted maleic anhydride is added to improve the dispersion of the graphene in the polypropylene material, so that the heat conductivity of the polypropylene material is obviously improved, the polypropylene composition which is simple to prepare and high in heat conductivity is obtained, and the prepared polypropylene composition can be used for preparing shell plastic parts of parts needing heat dissipation of automobiles.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The polypropylene composition is characterized by comprising the following components in parts by weight: polypropylene resin: 70-99.8 parts of a toughening agent: 0-30 parts of graphene: 1-5 parts of a compatilizer: 2-7 parts of an auxiliary agent: 0.2-2 parts of a solvent;
the compatilizer is SEBS grafted maleic anhydride, and SEBS in the SEBS grafted maleic anhydride contains benzene rings.
2. The polypropylene composition according to claim 1, wherein the polypropylene resin is one or a mixture of two of homo-polypropylene resin and co-polypropylene resin.
3. The polypropylene composition of claim 1, wherein the toughening agent is one or a mixture of two of ethylene-butene copolymer, ethylene-octene copolymer and styrene copolymer elastomer.
4. The polypropylene composition according to claim 1, wherein the additives are antioxidants and light stabilizers.
5. The polypropylene composition according to claim 4, wherein the antioxidant is hindered phenol antioxidant or phosphite antioxidant.
6. The polypropylene composition according to claim 5, wherein the antioxidant is one or a mixture of two or more of 1010, 1076, 3114, 168 and PEP-36.
7. The polypropylene composition according to claim 4, wherein the light stabilizer is a hindered amine light stabilizer.
8. The polypropylene composition according to claim 7, wherein the antioxidant is one or a mixture of two or more of UV-3808PP5, LA-402XP and LA-402 AF.
9. A process for the preparation of a polypropylene composition according to any one of claims 1 to 8, comprising the steps of,
s1, uniformly mixing the polypropylene resin, the toughening agent, the graphene, the compatilizer and the auxiliary agent;
and S2, adding the material mixed in the step S1 into a double-screw extruder, and carrying out melt mixing extrusion to obtain the simple and high-heat-conductivity polypropylene material.
10. The method for preparing a polypropylene composition according to claim 9, wherein in the operation of S2: the melting and mixing temperature is 200-210 ℃, and the screw rotating speed of the double-screw extruder is 350-450 rpm.
CN202011604665.5A 2020-12-29 2020-12-29 Polypropylene composition and preparation method thereof Active CN112708210B (en)

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Publication number Priority date Publication date Assignee Title
CN104559148A (en) * 2014-12-16 2015-04-29 惠州力王佐信科技有限公司 High-thermal-diffusion-coefficient high molecular material and preparation method thereof
KR102034670B1 (en) * 2017-11-21 2019-11-08 금호석유화학 주식회사 Electrically conductive resin composition and method of preparing the same
CN108034138B (en) * 2017-12-26 2021-01-01 金发科技股份有限公司 Polypropylene composition and preparation method and application thereof

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