SYNTHESIS AND CRYSTALLIZABILITY OF POLY(ETHYLENE GLYCOL)-b-POLY(ε-CAPROLACTONE)-b-POLY(ETHYLENE GLYCOL)

摘要

A family of poly(ethylene glycol)-b-poly(ε-caprolactone)-b-poly(ethylene glycol) has been prepared in high yields by a two step method. Their thermal and crystallization behaviors were studied by DSC and WXRD. The results illustrated that the crystallization and melting behaviors of the copolymers depended on the copolymer composition and the relative length of each block in the copolymers. The crystallization of the PCL block was strongly restricted by the crystallization of the lateral PEG blocks.