Sulfide polymers, fluorinated

The reaction is fundamentally a Friedel-Crafts reaction utilizing thi-onyl chloride followed by the reduction of the sulfoxide to the sulfide with oxaloyl chloride. The sulfide group activates the fluorine atom for the nucleophilic aromatic substitution polymerization. Thus, the ether linkage in the backbone of the polymer can be readily produced by a nucleophilic aromatic substitution. The reaction with bisphenol A proceeds at 150 C. 

Other polymers with a fuel resistance to solvents include 30% carbon fiber-reinforced polyphenylene sulfide, glass fiber-reinforced ethylene chlorotrifiuoroethyl-ene, 20% glass fiber-reinforced perfluoroalkoxy ethylene, 20% carbon fiber-reinforced polyvinylidene, and 20% glass fiber-reinforced fluorinated ethylene-propylene. 

Although not strictly the subject matter of this book, work is briefly reviewed next on the application of non mass spectrometric Py-GC methods in the determination of polymer structure. This information is inclnded in the hope, when necessary, that chemists will be able to adapt these methods by including a mass spectrometric detailed information on polymer structure acrylates [63, 105-107], rubbers [63, 108-110], PVC [63,111-115], aliphatic polyhydrazides [116], polyoxamides [116], polyamides [117], polyether imides [118], methacrylamide [119], aromatic aliphatic polyamides [117], polyurethanes [120], chitin graft poly(2-methyl 2-oxazolone) [121, 122], polyxylyl sulfide [123-126], epoxy resins [127], polyethylene oxalate [128], polytetrafluoroethylene [129], polyvinylidene chloride [129], polyepichlorohydrin, fluorinated ethylene-propylene copolymer [129], polyvinyl fluoride [129], polyvinylidene [129], fluoride [129], SBR copolymer [129] and styrene-isoprene copolymer [130]. 

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