Enzymatic synthesis and characterization of amphiphilic block copolymers of poly(ethylene oxide) and amylose

摘要

Amphiphilic A-B block copolymers, #omega#-methoxypoly(ethylene oxide)-amylose copolymers (MPEO-amylose), were synthesized by an enzymatic reaction using potato phosphorylase from an MPEO (M-bar_w=5.0 X 10~3)-maltopentaosylamine derivative as a primer and a-D-glucose-1-phosphate as a substrate. MPEO-amyloses with various molecular weights of amylose (DP-26,36,73 and 112) were obtained. None of the MPEO-amyloses (5 mg/ml) precipitate in water containing 10 vol.- DMSO even after 24 h. The MPEO-amyloses effectively form complexes with iodine in water.