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PTFE-modified polyphenylene sulfide (PPS)


Publication Time:

2021-11-12

The disadvantages of PPS are its poor impact resistance and difficult processing and molding. Because the inert surface of PTFE (Daikin L-5, or DuPont MP1000) is difficult to bond with PPS, Japan, from the viewpoint of improving surface affinity, uses a solubilizer to reduce the interfacial tension between the two phases, and uses the technology of mixing at a high shear rate to alloy this incompatible system.

PTFE-modified polyphenylene sulfide (PPS)

PTFE-modified polyphenylene sulfide (PPS)

PPS has the disadvantages of poor impact resistance and difficult processing and molding. Because the inert surface of PTFE (Daikin L-5, or DuPont MP1000) is difficult to bond with PPS, Japan, from the viewpoint of improving surface affinity, uses a solubilizer to reduce the interfacial tension of the two phases, and uses the technology of mixing at a high shear rate to alloy this incompatible system.

Domestically, a coating is made by mixing PPS powder with a mixing agent and then adding PTFE powder, so that the coating has excellent friction and wear resistance, adhesion, flexibility, and anti-stick properties. The mixing agent generally uses a system of ethanol, water, and sodium dodecylbenzene sulfonate. PTFE/PPS alloy solves the problem of high melt flow rate of PPS and difficulty in direct molding. It can still maintain high mechanical properties above 300℃, mainly used in corrosion-resistant pumps, valves, gaskets, and dynamic seals, bushings, automotive engine valve covers, chromatograph sliding seals and guide parts, etc.