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==Polyphenylene sulfide== [[Polyphenylene sulfide]] (PPS) is obtained by the condensation polymerization of p-dichlorobenzene and sodium sulfide. PPS has desirable chemical resistance, electrical properties, flame retardance, low coefficient of friction and high transparency to microwave radiation. PPS is principally used in coating applications. This is done by spraying an aqueous slurry of PPS particles and heating to temperatures above 370 Β°C. Particular grades of PPS can be used in injection and compression molding at temperatures of 300 to 370 Β°C at which PPS particles soften and undergo apparent crosslinking. Principal applications of injection and compression molded PPS include cookware, bearings, and pump parts for service in various corrosive environments.
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