디메틸 실록산과 2-히드록시에틸메타크릴레이트계 블락공중합체의 합성

Abstract

Block copolymers containing dimethy siloxane and 2-hydroxyethyl methacrylate sequences were synthesized by group transfer polymerization (GTP) of 2- trimethylsilyloxy ethyl methacrylate(TMS-EMA) using silyl ketene acetal terminated poly(dimethylsiloxane) (PDMS) as macroinitiator, followed by hydrolysis of TMS-EMA to HEMA. The block copolymers were obtained with controlled molecular weight and narrow molecular weight distribution. Trimethylsilyl groups in the P(TMS-EMA) block could be selectively hydrolyzed without interfering with Si-O bond in PDMS block. The block copolymers formed micelles in methanol, the effective diameters (Rh) of which were in the range of 78 ~110 nm with narrow distribution by dynamic light scattering (DLS). The latex particles, PMMA was synthesized by dispersion polymerization in supercritical carbon dioxide with these block copolymers as stabilizer.