Method of producing shaped body of cross-linked fluorine-containing graft copolymer by using radiation

摘要

The disclosure relates to enhancement of mechanical strength and heat resistance of a graft copolymer which is obtained by graft copolymerization of a fluorine-containing monomer that gives a crystalline polymer, such as vinylidene fluoride, with an elastomeric copolymer having peroxy bond, such as a ternary copolymer of vinylidene fluoride, chlorotrifluoroethylene and an unsaturated peroxy compound. A small amount of triallylisocyanurate is mixed with the graft copolymer, and the mixture is formed into a desired shape by a usual method such as calendering or compression moulding. The shaping material is exposed to ionizing radiation such as gamma-ray, which causes cross-linking of the graft copolymer.