Poly(phenylene sulfide). Part II. Processing, service properties and applications
Polimery 1999, No 3, 185
A general characteristics of poly(phenylene sulfide) (PPS) is given. PPS is a modem engineering plastic endowed w ith excellent thermal and chemical resistance, low creepability, inflammability, high dimensional stability and good dielectric properties, which are practically independent from external humidity and frequency. Good flow properties and thermal stability in the melt make PPS relatively easy to process by injection molding and extrusion. Injection molding of PPS has been described in detail, inclu d ing drying of the granulate and start-up of an injection molder, reasons for buckling of molds and corrective actions, and recycling of waste PPS (Fig. 2). The major injection molding parameters include mold temperature 130— 160°C, which controls the degree of crystallinity and properties of the product, and the temperature of the molten phase, 305— 345°C, at w hich the PPS flows freely and fills mold channels well. Fundamental property data (Table 1) and possible applications are summarized. Largest PPS consumers include the automotive, electronical and electrical engineering, audio/video, and chemical industries (Fig. 3).
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