Final rept. 1 Jan 1977-31 Dec 1979
PENNWALT CORP KING OF PRUSSIA PA CORPORATE RESEARCH AND DEVELOPMENT
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The objective of this program was the development of improved fluoropolymer resins for transducer applications. The effort involved synthesis, characterization, and processing of new resins with emphasis on those obtained by copolymerizing vinylidene fluoride VF2 with monomers such as tetrafluoroethylene TFE, vinyl fluoride VF, trifluoroethylene VF3, and hexafluoropropene HFP. Variations on the PVF2 homopolymer synthesis were also investigated. In a number of cases the piezoelectric activity of the copolymers was found to be as good or better than that of the PVF2 homopolymer however, a distinct advantage of the copolymer vs homopolymer is the fact that, in general, the copolymers are considerably easier to fabricate into thick, oriented film configurations, as needed for underwater use.