METHODS FOR PRODUCING POLYPHENYLENE SULFIDE COMPOSITE MATERIALS AND POLYPHENYLENE SULFIDE COMPOSITE MATERIALS

Abstract

The invention relates to a method for producing polyphenylene sulfide (PPS) polymer composite materials comprising the following steps: (i) surface polarization of polytetrafluoroethylene (PTFE) by: - ​​dispersing PTFE powder into a polar solution consisting of water and glycerin, - bubbling oxygen, preferably under stirring conditions, and then irradiating the surface of the PTFE-containing solution with cold plasma to uniformly modify the PTFE powder surface, - filtering, washing and drying to obtain the modified PTFE powder (mPTFE); (ii) preparation of swollen graphite powder (EG); (iii) Masterbatch production: - Pre-mixing PPS powder at a rate of 67 to 78.5% by weight, short carbon fiber (sCF) at a rate of 20 to 30% by weight, and EG at a rate of 1.5 to 3% by weight in a heated mixer; - Grinding and granulation using a screw extruder to obtain PPS / sCF / EG masterbatch (MTB);(iv) Fabrication of PPS polymer composite material: - MTB granules and mPTFE powder are dried, then mixed in a ratio of MTB 100 parts by weight and mPTFE 20–30 parts by weight, - grinding and mixing, granulation by screw extruder to obtain PPS polymer composite material granules. In addition, the invention also relates to self-lubricating polymer composite material obtained from the above method.;