Polyphenylene sulfide-聚苯硫醚-英語(yǔ)特性及其應(yīng)用

1、tt Characteristics and application of Polyphenylene sulfide 主講人：楊崇嶺Words and Expressionspapermaking造紙be converted to被轉(zhuǎn)換為semiconducting半導(dǎo)體polysulfide pli:slfad n. 多硫化物 approximately pr:ksmtli adv. 近似地，大約;許 alkalie堿solvent slvnt n. 溶劑1Background Polyphenylene sulfide (PPS) is an organic polymer consis

2、ting of aromatic rings linked with sulfides. Synthetic fiber and textiles derived from this polymer are known to resist chemical and thermal attack. PPS is used to make filter fabric for coal boilers, papermaking felts, electrical insulation, specialty membranes, gaskets, and packings. PPS is the pr

3、ecursor to a conducting 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.2ProductionThe Federal Trade Commission definition for sulfur fiber is A manufactured fiber in which the fiber-f

4、orming substance is a long chain synthetic polysulfide in which at least 85% of the sulfide (S) linkages are attached directly to two (2) aromatic rings.The PPS (polyphenylene sulfide) polymer is formed by reaction of sodium sulfide with p-dichlorobenzene:ClC6H4Cl + Na2S 1/n C6H4Sn + 2 NaCl3Structur

5、e and performance Polyphenylene sulfide is an engineering plastic, commonly used today as a high-performance thermoplastic.Polyphenylene sulfide can be molded, extruded, or machined to high tolerances. In its pure solid form, it may be opaque white to light tan in color. Maximum service temperature

6、is 218 C (424 F). Polyphenylene sulfide has not been found to dissolve in any solvent at temperatures below approximately 200 C (392 F). An easy way to identify the compound is by the metallic sound it makes when struck. w4Fiber characteristicsPPS 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 and alkalies, and to mildew, to bleach