Radiation-induced copolymerization of styrene-butyl acrylate in the presence of ultra-fine powdered styrene-butadiene rubber

摘要

Styrene(St)-butyl acrylate(BA)copolymers were prepared by two-stage polymerization:St/BA was pre-polymerized to a viscous state by bulk polymerization with initiation by benzoyl peroxide(BPO)followed by ~(60)Co y-ray radiation curing.The resultant copolymers had higher molecular weight and narrower molecular weight distribution than conventional methods.After incorporation of ultra-fine powdered styrene-butadiene rubber(UFSBR)with a particle size of 100nm in the monomer,the glass transition temperature(T_g)of St-BA copolymer increased at low rubber content.Both the St-BA copolymer and the St-BA copolymer/UFSBR composites had good transparency at BA content below 40%.