Facile Method of Controlling Monomer Sequence Distributions in Random Copolymers

Abstract

Copolymers of poly(styrene-co-4-bromostyrene) (PBrxS) with adjustable monomer sequence distribution of styrene (S) and 4-bromostyrene (4-BrS) and composition (x = content of 4-BrS) are prepared by brominating parent polystyrene (PS). While bromination reaction carried out above the theta temperature (Θ) leads to PBrxS with random monomer distribution, bromination of PS performed at temperatures below Θ produces PBrxS having a random-blocky character.