NEW EFFICIENT METHOD FOR MACROMONOMER SYNTHESIS THROUGH FREE-RADICAL ADDITION-FRAGMENTATION-FUNCTIONALIZATION

Pentadiene-functional macromonomers were synthetized by a single step free radical reactions based on addition-fragmentation-substitution. N arrow disperse polymers with functionalities near to the theoretical l imit with and without branched structures could be prepared by either high-conversion-fractionation method or conversion method. The macromo nomers copolymerised well with other monomers giving rise to well defi ned comb-like graft copolymers. The polymerizability of the terminal f unctions were independent of the molar masses of the macromonomers. Th e graft copolymers were characterized by spectral, elemental and SEC ( multidetectors) analyses.