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Poly chloro tri fluoro ethylene

المؤلف:  A. Ravve

المصدر:  Principles of Polymer Chemistry

الجزء والصفحة:  383

2026-02-03

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Poly chloro tri fluoro ethylene

 The monomer can be prepared by dechlorination of trichloro trifluoroethane with zinc dust and ethanol.

It is a toxic gas that boils at 26.8C. Polymerization of chlorotrifluoroethylene is usually carried out commercially by free-radical suspension polymerization. Reaction temperatures are kept between 0 and 40C to obtain a high molecular weight product. A redox initiation based on reactions of persulfate, bisulfite, and ferrous ions is often used. Commercial polymers range in molecular weights from 50,000 to 500,000. Polychlorotrifluoroethylene exhibits greater strength, hardness, and creep resistance than does polytetrafluoroethylene. Due to the presence of chlorine atoms in the chains, however, packing cannot Beas tight as in polytetrafluoroethylene, and it melts at a lower temperature. The melting point is 214C. The degree of crystallinity varies from 30 to 85%, depending upon the thermal history of the polymer. Polytrifluorochloroethylene is soluble in certain chlorofluoro compounds above 100C. It flows above its melting point. The chemical resistance of this material is good, but inferior to polytetrafluoroethylene.