Polysulfure de phénylène

Polyphenylene sulfide (PPS) is an organic polymer consisting of aromatic rings linked by sulfides. Synthetic fiber and textiles derived from this polymer resist chemical and thermal attack. PPS is used in filter fabric for coal boilers, papermaking felts, electrical insulation, film capacitors, specialty membranes, gaskets, and packings. PPS is the precursor to a conductive polymer of the semi-flexible rod polymer family. The PPS, which is otherwise insulating, can be converted to the semiconducting form by oxidation or use of dopants. Polyphenylene sulfide is an engineering plastic, commonly used today as a high-performance thermoplastic. PPS can be molded, extruded, or machined to tight tolerances. In its pure solid form, it may be opaque white to light tan in color. Maximum service temperature is . PPS has not been found to dissolve in any solvent at temperatures below approximately . An easy way to identify the compound is by the metallic sound it makes when struck. PPS is marketed by different brand names by different manufacturers. The major industry players are China Lumena New Materials, Solvay, Kureha, HDC Polyall, Celanese, DIC Corporation, Toray Industries, Zhejiang NHU Special Materials, SABIC, and Tosoh. Other manufacturers include Chengdu Letian Plastics, Lion Idemitsu Composites, and Initz (a joint venture of SK Chemicals and Teijin). The following are examples of brand names by manufacturer and PPS type: Tedur, Albis Plastic, linear type DIC.PPS, DIC Corporation, linear and cross-linked DURAFIDE, Polyplastics Co. Ltd, linear type ECOTRAN, HDC Polyall, distributed and compounded via A. Schulman Fortron, Ticona, linear type Petcoal, Tōsō Therma-Tech TT9200-5001, PolyOne Corporation Ryton, Solvay Specialty Polymers, linear and cross-linked Torelina Toray NHU-PPS, Zhejiang NHU Company Ltd., linear type and cross-linked PPS is one of the most important high temperature thermoplastic polymers because it exhibits a number of desirable properties. These properties include resistance to heat, acids, alkalies, mildew, bleaches, aging, sunlight, and abrasion.