Preparation of heterocyclic block copolymer from perfluoroalkylene oxide {60 , {107 -diamidoximes

摘要

Diamidoxime monomers having the formula: <IMAGE> are intermolecularly and thermally condensed to form a heat and chemical resistant polymer containing 1,2,4-oxadiazole linkages and having the formula: <IMAGE> wherein R represents identical bivalent organic radicals or any combination of bivalent organic radicals selected from the group consisting of -(CX2)p-, wherein p ranges from 2 to 8 when X is fluorine and 2 to 18 when X is hydrogen, chlorine, nitro or aryl; arylene; and an oligometric or polymeric radical prepared by reacting a dicarboxylic acid halide with a fluorinated epoxide and having the formula: