A novel graft macromolecular coupling agent with well-defined structure was synthesized by atom transfer radical polymerization(ATRP). Since the silicon of graft polymers possesses a strong affinity to hydroxyl mineral, it gives fillers some new properties such as the increase of the interaction of fillers with matrix. The properties, structure of macromolecular coupling agent and its composite were studied by dynamic mechanical spectra, IR, UV, NMR, GPC and SEM.
Mono-hydroxyl terminated polycaprolactone(PCL) was prepared by Novozyme 435 catalyzed ring-opening polymerization(ROP) of ε-caprolactone(ε-CL) initiated by methanol,and subsequently converted to bromine ended PCL by the esterification of the resulting macromolecules with α-bromopropionyl bromide.The macroinitiators containing α-bromoester group were employed in the atom transfer radical polymerization(ATRP) of glycidyl methacrylate(GMA) with CuCl/2,2-bipyridine(bpy) as the catalyst system to obtain amphiphilic diblock copolymer PCL-b-PGMA.
