A vinylidene fluoride block copolymer containing perfluoropolyether groups

Peroxide initiated vinylidene fluoride (VDF) telomerization was investigated in the presence of bromine terminated perfluoropolyethers CF 3 (OCF 2 CF 2 ) m (OCF 2 ) p Br, (R f -Br). R f -Br act as telogen agents producing the above reaction compounds of general formula R f -(VDF) n Br. Data on telomer microstructure by fluorine NMR, glass transition temperature and crystallinity of (VDF) n moiety are also reported and discussed. The products show properties of di-block copolymers.