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Preparation method and application of polypropylene composite material

A technology of composite materials and polypropylene, applied in the field of polymer material technology and science, can solve the problems that limit the wide application of polypropylene, large linear expansion coefficient, deformation of injection molded parts, etc., and achieve improved UV resistance and low linear expansion coefficient , the effect of increasing strength

Pending Publication Date: 2020-08-18
ANHUI UNIVERSITY OF ARCHITECTURE +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, unmodified polypropylene materials in the industrial field have a large linear expansion coefficient and poor dimensional stability. After molding, injection molded parts are prone to deformation due to internal stress concentration. At the same time, the wear resistance is also poor, which limits the wide application of polypropylene. application

Method used

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  • Preparation method and application of polypropylene composite material

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Experimental program
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Effect test

Embodiment 1

[0033] Present embodiment is shown in Table 1 by each raw material formula of polypropylene composite material, and its preparation method is to carry out as follows:

[0034] 1), blending tetrabutyl titanate and ethanol, stirring to obtain a solution of tetrabutyl titanate and ethanol, and then dispersing glass fibers in the above solution, wherein the mass ratio of tetrabutyl titanate to glass fiber is 1.2:1, transfer the dispersion to a sealed reaction kettle, seal and heat, react at 250°C for 3h, cool to room temperature, centrifugally wash, dry, and calcinate at 700°C for 6h to obtain titanium dioxide-coated glass fibers;

[0035]2) Graphene, silicon carbide, talcum powder and polyvinyl alcohol solution are mixed by mass ratio 1:1:2:2, filter, and wash and dry with deionized water, obtain pretreatment talcum powder; By mass ratio 0.5:1.2: 2 Add epoxy resin, ethylene glycol diglycidyl ether, and pretreated talc powder into the reactor, stir, then add triethylenetetramine w...

Embodiment 2

[0040] Present embodiment is shown in Table 1 by each raw material formula of polypropylene composite material, and its preparation process is the same as embodiment 1

Embodiment 3

[0042] Present embodiment is shown in Table 1 by each raw material formula of polypropylene composite material, and its preparation process is the same as embodiment 1

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Abstract

The invention provides a preparation method and application of a polypropylene composite material. The polypropylene composite material is characterized by comprising the raw materials in parts by mass: 62-75 parts of polypropylene resin, 30-45 parts of modified glass fibers, modified talcum powder and modified master batch, 1-2 parts of a lubricant, and 1-10 parts of maleic anhydride grafted polyethylene, wherein the ratio of the modified glass fibers to the modified talcum powder to the modified master batch is (22-25):(11-14):(3-5). The preparation method comprises the steps: preparing themodified glass fibers, the modified talcum powder and the modified master batch, adding the polypropylene resin, the modified glass fibers, the modified talcum powder, the lubricant, the modified master batch and the maleic anhydride grafted polyethylene into a high-speed mixer according to a ratio, mixing, melting, blending and extruding through a double-screw extruder, and carrying out water-cooling drawing, air-drying and dicing to obtain the polypropylene composite material. The polypropylene composite material disclosed by the invention has the advantages of low linear expansion coefficient, high cold resistance and the like, can be used for injection molding of injection molded parts generating friction with metals, and can also be applied to injection molding of household appliancesand automobile parts.

Description

technical field [0001] The invention belongs to the field of polymer material technology and science, in particular to a preparation method and application of a polypropylene composite material. Background technique [0002] Polypropylene (PP) has the advantages of excellent comprehensive performance, rich sources of raw materials, and strong designability. It is particularly worth mentioning that polypropylene has low toxicity, good chemical stability, and no toxic substances are released during use, which is relatively harmful to the human body. Small, so that its application in the food hygiene industry is gradually increasing. However, when it is assembled with metal parts and used under extremely cold and high-frequency vibration conditions, PP is required to meet the above basic requirements and also have the following properties: 1. Low linear expansion coefficient to ensure the dimensional stability of injection molded parts; 2. Excellent wear resistance; 3. High co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/12C08L51/06C08L67/02C08L23/08C08K13/06C08K9/02C08K7/14C08K9/04C08K3/34
CPCC08L23/14C08L23/12C08L2205/02C08L2205/035C08L51/06C08L67/02C08L23/0815C08K13/06C08K9/02C08K7/14C08K9/08C08K3/34
Inventor 王平吴秀杰王毅张寿生刘同民陈德正丁运生冯绍杰孙晓红周意杨刘超
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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