Redox initiation of copolymerization of styrene with hydroxyl terminated polybutadiene using Ce(IV) as an oxidant

Abstract

Radical polymerization of styrene (St) with hydroxyl-terminated polybutadiene (HTPB) using Ce(IV) as an oxidant was carried out under nitrogen atmosphere. The formation of styrene-butadiene block copolymer was confirmed by 1 H-NMR and IR spectroscopy. The variation in reaction parameters affected the yield of the product. St homopolymer formation under the reaction conditions used is ruled out. Crosslinking of polybutadiene chains through the styryl radical on growing block copolymer chains is suggested from viscosity and swelling measurements.

Atheroembolic renal disease: Underdiagnosed and misunderstood

“…Our group synthesized block copolymers by a macroredox polymerization technique, which involved free‐radical generation at the terminals of a preformed telechelic block comprising a first monomer in the presence of an oxidant and a second monomer. In this procedure, homopolymers formation was negligible for monomers with low chain‐transfer constants 49, 54–56…”