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Polypropylene/montmorillonite/graphite nanocomposite material and preparation method for same

A nanocomposite material and composite material technology are applied in the field of polypropylene/montmorillonite/graphite nanocomposite materials and their preparation, which can solve the problems of large molding shrinkage, insufficient rigidity, poor impact performance, etc., and achieve good electrical conductivity, The effect of simple preparation process and excellent mechanical properties

Inactive Publication Date: 2013-10-23
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, polypropylene has the disadvantages of poor impact performance, large product molding shrinkage, poor stability, insufficient rigidity at high temperature, easy to burn, high brittleness at low temperature, and easy to break.

Method used

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  • Polypropylene/montmorillonite/graphite nanocomposite material and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 5 parts of homopolypropylene (70% isotacticity, 150,000 molecular weight), 1 part of organically modified montmorillonite treated with cetyltrimethylammonium bromide, 0.1 part of maleic anhydride and 0.01 Parts of tert-butyl peroxide are pre-mixed in a high-speed mixer, the mixing time is 5-20min, extruded and granulated with a twin-screw extruder, and the extrusion temperature is 190-220°C to obtain a spare masterbatch; 95 parts of homopolypropylene (70% isotacticity, 150,000 molecular weight), 0.01 part of 2,6-tertiary butyl-4-methylphenol, 1 part of stearic acid, the masterbatch obtained in the above steps 1. 1 part of graphite with a particle size of 450 microns is mixed in a high-speed mixer, the mixing time is 5-20min, extruded with a twin-screw extruder, and the extrusion temperature is 200-230°C to obtain polypropylene / montmorillonite / Graphite nanocomposite material, its properties are shown in Table 1.

Embodiment 2

[0039] 10 parts of homopolypropylene (75% isotacticity, 200,000 molecular weight), 2 parts of cetyltrimethylammonium chloride-treated organically modified montmorillonite, 02 parts of maleic anhydride and 0.02 Parts of di-tert-butyl peroxide are pre-mixed in a high-speed mixer, the mixing time is 5-20min, extruded and granulated with a twin-screw extruder, and the extrusion temperature is 190-220°C to obtain a spare masterbatch; 90 parts of homopolypropylene (isotacticity is 75%, molecular weight is 200,000), 0.05 part of diphenylamine, 2 parts of calcium stearate, the masterbatch obtained in the above steps, 3 parts of graphite with a particle size of 470 microns at high speed Mix in a mixer, the mixing time is 5-20min, and extrude with a twin-screw extruder at an extrusion temperature of 200-230°C to obtain a polypropylene / montmorillonite / graphite nanocomposite material, whose properties are shown in Table 1.

Embodiment 3

[0041] 15 parts of homopolypropylene (80% isotacticity, 250,000 molecular weight), 3 parts of octadecyltrimethylammonium bromide processed organically modified montmorillonite, 0.3 part of maleic anhydride and 0.03 Parts of dicumyl peroxide are pre-mixed in a high-speed mixer, the mixing time is 5-20min, extruded and granulated with a twin-screw extruder, and the extrusion temperature is 190-220°C to obtain a spare masterbatch; then 85 1 part of homopolypropylene (80% isotacticity, 250,000 molecular weight), 0.1 part of 3,5-tertiary butyl-4-hydroxyphenyl sulfide, 3 parts of zinc stearate, the precursor obtained in the above steps granules and 5 parts of graphite with a particle size of 500 microns are mixed in a high-speed mixer, the mixing time is 5-20min, extruded with a twin-screw extruder, and the extrusion temperature is 200-230°C to obtain polypropylene / montmorillonite The properties of soil / graphite nanocomposites are shown in Table 1.

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Abstract

The invention belongs to the technical field of high polymer materials, and discloses a polypropylene / montmorillonite / graphite nanocomposite material and a preparation method for the polypropylene / montmorillonite / graphite nanocomposite material. The composite material is prepared from the following constituents in parts by weight: 100 parts of polypropylene, 1-10 parts of organically-modified montmorillonite, 0.1-1 part of maleic anhydride, 0.01-0.1 part of an initiator, 1-12 parts of graphite, 0.01-1 part of an antioxidant and 1-10 parts of a lubricant. The preparation method comprises the following steps of: mixing 5-40 parts of polypropylene in the 100 parts of polypropylene with the 1-10 parts of organically-modified montmorillonite, the 0.1-1 part of maleic anhydride and the 0.01-0.1 part of the initiator for 5-20 minutes, extruding at 190-220 DEG C by a double-screw extruder to granulate, so as to obtain maleic anhydride-grafted polypropylene master batches containing organic montmorillonite; and then mixing the remainder polypropylene in the 100 parts of polypropylene with the 1-10 parts of the lubricant, 0.01-1 parts of the antioxidant, the master batches obtained in the step aforementioned, and 1-12 parts of graphite for 5-20 minutes, extruding at 200-230 DEG C by a double-screw extruder to granulate, so as to prepare the composite material. The composite material is good in mechanical property, conductive property and flame-retardant property.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a polypropylene / montmorillonite / graphite nanocomposite material and a preparation method thereof. Background technique [0002] As a semi-crystalline polymer material, polypropylene has the advantages of non-toxicity, low relative density, low price, high electrical insulation performance, easy molding and processing, acid and alkali resistance, good hardness and heat resistance, etc., and can be widely used in packaging Materials, household appliances, automobile industry and other fields. But at the same time, polypropylene has the disadvantages of poor impact performance, large product molding shrinkage, poor stability, insufficient rigidity at high temperature, easy combustion, high brittleness at low temperature, and easy fracture. In view of the above problems, methods such as copolymerization, blending, and foaming are usually used to improve the properties of pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08K9/04C08K3/34C08K3/04C08J3/22C09C1/42C09C3/08C08F255/02
Inventor 姚寅芳
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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