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Method for preparing polymer/inorganic filler composite material

A technology of inorganic fillers and composite materials, which is applied in the field of preparation of polymer/inorganic filler composite materials, can solve the problems of complex process and increased cost, and achieve the effects of simple process, reduction of defects, and improvement of dispersion.

Active Publication Date: 2014-04-30
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the usual graft polymerization is carried out in a solution, and the added solvent needs to be removed after the particles are treated. The process is more complicated, which increases the cost.

Method used

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  • Method for preparing polymer/inorganic filler composite material
  • Method for preparing polymer/inorganic filler composite material
  • Method for preparing polymer/inorganic filler composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] A raw material of polyethylene / inorganic filler composite material comprises the following components and their contents in parts by weight:

[0058] components weight ratio Polyethylene (PE, as a crystalline polymer matrix) 95 Talc (Talc, a layered silicate filler) 5

[0059] Note: The above components do not contain compatibilizers.

[0060] The first step, at first prepare raw materials by above-mentioned components;

[0061] In the second step, first place the talc powder (Talc) in an oven at 120°C for 12 hours;

[0062] In the third step, the dry talcum powder and polyethylene obtained in the second step are placed in a high-mixer and pre-mixed for 6 minutes at a speed of 150 revolutions per minute; to obtain a polyethylene / talcum powder premix;

[0063] Then, put the obtained polyethylene / talcum powder premix into a twin-screw extruder for melt blending, extruding and granulating to obtain polyethylene / talcum powder premixed composite...

Embodiment 2

[0068] A raw material of polyethylene / inorganic filler composite material comprises the following components and their contents in parts by weight:

[0069] components weight ratio Polyethylene (PE, as a crystalline polymer matrix) 30 Talc (Talc, a layered silicate filler) 40 Polyethylene grafted maleic anhydride (PE-MA, as compatibilizer) 30

[0070] The first step, at first prepare raw materials by above-mentioned components;

[0071] In the second step, first place the talc powder (Talc) in a 120°C oven for 12 hours, and put the compatibilizer polyethylene grafted maleic anhydride in an 80°C oven for 12 hours;

[0072] In the third step, the polyethylene, dry talcum powder and compatibilizer obtained in the second step are placed in a high mixer and pre-mixed for 5 minutes at a speed of 100 rpm to obtain polyethylene / talcum powder / polyethylene bonded branched maleic anhydride premix;

[0073] Then, put the obtained polyethylene / talcum pow...

Embodiment 3

[0078] A kind of raw material of polypropylene / inorganic filler composite material comprises following component and its weight portion content:

[0079] components weight ratio Isotactic polypropylene (PP, as a crystalline polymer matrix) 70 Graphite (NG, for inorganic filler) 30

[0080] Note: The above components do not contain compatibilizers.

[0081] The first step, at first prepare raw materials by above-mentioned components;

[0082] In the second step, first place the inorganic filler graphite (NG) in an oven at 80°C for 12 hours;

[0083] In the third step, the isotactic polypropylene obtained in the second step and the dry graphite are placed together in a high-mixer and premixed for 5 minutes, and its rotating speed is 100 rpm to obtain an isotactic polypropylene / graphite premix;

[0084] Then, put the obtained premix into a twin-screw extruder for melt blending, extrusion, and granulation to obtain isotactic polypropylene / graphite pre...

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Abstract

The invention discloses a method for preparing a polymer / inorganic filler composite material. The method for preparing the polymer / inorganic filler composite material is characterized by comprising the following steps: carrying out mixing granulation on polymers and inorganic fillers according to a certain proportion, conveying by an extruder in a bidirectional stretching melt mixing and molding integrated device, plasticizing and melting, thereby obtaining particles or sheets of the polymer / inorganic filler composite material with the inorganic fillers with good dispersibility and excellent performances under the bidirectional stretching-shearing acting force of bidirectional stretching melt mixers. According to the invention, inorganic filers are distributed more uniformly in a polymer matrix, and have few aggregates; moreover, the dispersion morphology and the dispersion degree of the inorganic fillers can be regulated and controlled by changing the number of the bidirectional stretching melt mixers. The polymer composite material obtained by the method provided by the invention has favorable mechanical performance, favorable thermal stability, favorable electric conductivity and favorable flame retardance. The method for preparing the polymer / inorganic filler composite material, which is provided by the invention, can be used for continuous production, is convenient to operate and control, is stable in quality, is high in production efficiency, and has wide application prospect.

Description

technical field [0001] The invention relates to a method for preparing a polymer / inorganic filler composite material, which is especially suitable for dispersing a large content of inorganic filler in a polymer matrix, and belongs to the field of preparation technology and processing of polymer / inorganic filler composite materials. Background technique [0002] The polymer / inorganic filler composite material is a composite material in which the inorganic filler is dispersed in the polymer matrix, and the dispersion of the inorganic filler in the polymer is a research focus in this field. Especially when the particle content is high, the particles are easy to agglomerate; moreover, once agglomeration occurs, it is difficult to further disperse through processing. When the amount of added inorganic filler is small, in order to achieve a better dispersion effect, solution blending, emulsion blending, and in-situ polymerization are generally used. However, these methods are not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/06C08L23/06C08L23/12C08L69/00C08L55/02C08L77/02C08L67/02C08L51/06C08K3/34C08K3/04C08K3/22C08K3/26C08K7/14C08K7/20
Inventor 李姜雷凡郭少云幸敏琦罗明华单桂芳
Owner SICHUAN UNIV
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