폴리비닐알콜을 안정제로 사용한 스타이렌의 분산중합

초록

The synthesis of polymer microspheres with 1 ?10 mm in diameter has received much attention due to their applications in electronic, electric, and bio-related areas. Dispersion polymerization has been known to be useful to prepare such polymer particles in a single step. Since alcohols are used as the medium for the polymerization, alcohol-soluble stabilizers including poly(vinyl pyrrolidone), hydroxypropyl celluose, and poly(acrylic acid) have been frequently utilized. In this study, poly(vinyl alcohol) (PVA) was employed as the steric stabilizer in dispersion polymerization of styrene in methanol. The PVP concentrations was increased from 0.5 to 20 wt% relative to styrene, and the polymerization characteristics were investigated.