Vinylidene cyanide copolymers dielectricity

Random copolymers based on acrylonitrile and methacrylonitrile with ethyl a-acetoxyacrylate [69] were synthesized by radical copolymerization. The microstructure of the resulting copolymers was characterized by C NMR spectroscopy, and some reactivity ratios could be assessed. In addition, copolymers based on methyl vinylidene cyanide (MVCN) and vinyl acetate [70], styrene [71], or substituted styrene also exhibit interesting dielectric behavior [72]. [Pg.457]

To develop dielectric polymers with C-CN and C-F groups, the syntheses of poly(vinylidene fluoride)-h-poly(AN, MAN, VCN) (PVDF-h-PMcN) block copolymers (Scheme 20.8), using the iodine transfer polymerization (ITP) of acrylonitrile (AN), methacrylonitrile (MAN), and vinylidene cyanide (VCN), in the presence of PVDF-1, was reported. In a first step, the ITP of vinylidene fluoride (or 1,1-difluoroethylene, VDF) with C6F13I initiated by tcrt-butyl peroxypivalate (TBPPI)... [Pg.467]

T. T. tWhng and Y. lUuse, Fcnoelectriclike dielectric behavior in the piezoelcctiic amorphoui copolymer of vinylidene cyanide and vinyl acetate, J. AppL Pkys. 62 3466 (1967). [Pg.362]

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