Preparation of block copolymers using a new polymeric peroxycarbamate

Abstract

Abstract Block copolymers of poly(styrene- b -methyl methacrylate), poly(styrene- b -n-butyl methacrylate) and poly(methyl methacrylate- b -styrene) have been prepared via chemical reactions. A new polymeric peroxycarbamate is synthesized by reacting equimolar amounts of an aliphatic diisocyanate with a dihydroperoxide. This compound is an effective polymerization initiator, and is used to prepare active prepolymers containing fragments of polymeric peroxycarbamate. A second vinyl monomer is then incorporated to produce various block copolymers. Styrene contents, intrinsic viscosities and chemical and mechanical properties of the copolymers were determined.