Bisacylphosphine oxides as bifunctional photoinitiators for block copolymer synthesis


GUNERSEL E., HEPUZER Y., Yagci Y.

ANGEWANDTE MAKROMOLEKULARE CHEMIE, vol.264, pp.88-91, 1999 (Journal Indexed in SCI) identifier identifier

Abstract

Block copolymers of styrene (St) and methyl methacrylate (MMA) were prepared via a two-step procedure by using bisacylphosphine oxide (BAPO) as photoinitiator. Photolysis of BAPO at lambda = 420 nm in the presence of St yielded polymers with monoacylphosphine oxide terminal groups. Subsequent irradiation of the polymers in the presence of MMA at lambda = 380 nm produced block copolymers. Block copolymer formation was evidenced by spectral measurements and GPC analysis.