High-dimension-stability and friction-resistant polyether-ether-ketone composite material and preparation method thereof

A technology of dimensional stability and polyetheretherketone, applied in the field of high dimensional stability and abrasion-resistant polyetheretherketone composite materials and its preparation, can solve the problems of low linear expansion coefficient and molding shrinkage

Inactive Publication Date: 2011-11-23
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PEEK itself has a low linear expansion coefficient and molding shrinkage, but for many application fields, the dimensional stability of PEEK still needs to be further improved

Method used

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  • High-dimension-stability and friction-resistant polyether-ether-ketone composite material and preparation method thereof
  • High-dimension-stability and friction-resistant polyether-ether-ketone composite material and preparation method thereof
  • High-dimension-stability and friction-resistant polyether-ether-ketone composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] in N 2 Under protection, dissolve 6g of each of the three high-temperature-resistant coupling agents g-R, g-A, and g-S in 300ml of organic solvent DMF, then add 100g of wollastonite, stir, and heat to the reflux temperature of 152°C, then add 5ml of water to the system , continue to heat and reflux for 1 hour, filter with suction, wash the obtained modified wollastonite with DMF for 3 times, and dry in a vacuum oven at 80° C. to remove the organic solvent. Mix 100 g of the obtained modified wollastonite with 900 g of polyether ether ketone powder, pre-mix uniformly in a high-speed mixer, and then granulate through a twin-screw extruder to obtain the polyether ether ketone composite material of the present invention .

[0040] The linear expansion coefficient of each component material is shown in Table 1. Since wollastonite itself has a low linear expansion coefficient, and the good interfacial interaction provided by the high-temperature resistant coupling agent great...

Embodiment 2

[0045] The PEEK powder of unmodified wollastonite 400g and 600g is mixed uniformly on the high-speed mixer, adds the feed funnel of twin-screw extruder, then uses twin-screw extruder to extrude, granulates, obtains 1000g wollastonite content is 40 wt% of pellets 1;

[0046] Add 600g of REEK powder into the feeding hopper of the twin-screw extruder, introduce 400g of continuous glass fiber from the first exhaust port of the twin-screw, and then use the twin-screw extruder to extrude and granulate to obtain 1000g of glass fiber content Be the pellet 2 of 40wt%; The glass fiber used in the present invention is the alkali-free glass fiber that Hangzhou Qiantang River Special Glass Technology Co., Ltd. produces;

[0047] Add 1000g of REEK powder into the feeding hopper of the twin-screw extruder, then use the twin-screw extruder to extrude and granulate to obtain 1000g of pure PEEK pellets 3;

[0048] Take 125g of pellet 1, 500g of pellet 2, and 375g of pellet 3 and mix them unifo...

Embodiment 3

[0050] Get the 250g pellet 1 prepared in Example 2, the 500g pellet 2, and the 250g pellet 3 mix uniformly on a high-speed mixer, add the feeding funnel of the twin-screw extruder, then use the twin-screw extruder to extrude and granulate, A polyetheretherketone composite material containing 10wt% wollastonite and 20wt% glass fiber was obtained, which was denoted as PEEK / 10wt%W / 20wt%GF.

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Abstract

The invention belongs to the field of high-performance polymer, and relates to a high-dimension-stability and friction-resistant polyether-ether-ketone composite material and a preparation method thereof. The composite material comprises the following components in terms 100 percent by weight: 60-90 percent of polyether-ether-ketone resin, 0.05-0.12 percent of high-temperature-resistant coupling agent, 5-20 percent of wollastonite and 0-30 percent of glass fiber. The preparation method comprises the following steps of: dissolving the high-temperature-resistant coupling agent into an organic solvent under the protection of N2; adding the wollastonite; stirring; heating to a reflow temperature; adding water and continuously heating to reflow for 1-4 hours; performing extraction filtration to obtain modified wollastonite; washing the modified wollastonite, drying and mixing with polyether-ether-ketone powder; extruding through a double-screw extruder; and granulating to obtain the polyether-ether-ketone composite material. The composite material prepared by the invention has extremely low linear expansion coefficient and forming shrinkage rate, also has self-lubrication property and high mechanical performance and is applied to preparation of bearings, gears, valve plates and the like.

Description

technical field [0001] The invention belongs to the field of high-performance polymers, and in particular relates to a polyetheretherketone composite material with high dimensional stability and abrasion resistance and a preparation method thereof. Background technique [0002] PEEK is a typical thermoplastic high-performance polymer, which has high temperature resistance, solvent resistance, aging resistance, hydrolysis resistance, high specific strength, specific modulus and other properties, especially in the harsh environment of high temperature and high humidity. Good comprehensive performance, therefore, in today's increasingly demanding material properties, the importance of PEEK and its composite materials has become increasingly prominent. In recent years, with the improvement of the requirements for the use temperature, load capacity and wear resistance of polymer materials, traditional polymer wear-resistant materials, such as nylon and polytetrafluoroethylene, ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/16C08K9/06C08K3/34C08K13/04C08K7/14B29B9/06
Inventor 王贵宾马刚岳喜贵张淑玲牟建新姜振华吴忠文
Owner JILIN UNIV
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