Polyimides from 4,4′-hexafluoroisopropylidene diphthalic anhydride and fluorine-containing diamines varying in structure have been prepared in order to study the effect of different fluorinated segments upon the dielectric constant. The thermal and electrical properties of the new polymers are discussed. The effect of fluorine substitution on the dielectric constant of the polyimides has been demonstrated for a broad spectrum of fluorine-containing diamine structures.
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Misra et al. (1992) studied this question.
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