- 고분자량 폴리비닐알코올의 합성에 관한 연구(III) -아세트산비닐의 저온 레독스 에멀젼중합에 의한 고분자량 혼성배열 폴리비닐알코올의 합성 및 특성해석-
- ㆍ 저자명
- 류원석,곽영제,Ryu. Won-Seok,Gwak. Yeong-Je
- ㆍ 간행물명
- 韓國纖維工學會誌
- ㆍ 권/호정보
- 1996년|33권 4호|pp.321-329 (9 pages)
- ㆍ 발행정보
- 한국섬유공학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
Poly(vinyl acetate)(PVAc) having low degree of branching of acetyl group lower than one was synthesized by the low temperature-redox emulsion polymerization of vinyl acetate at $0^{circ}C$. Subsequent saponification yielded high molecular weight poly(vinyl alcohol)(PVA) having number-average degree of polymerization $P_n$ of 4,200. $P_n$ of PVA was constant and independent of the increase of $P_n$ of PVAc contrary to the increase of conversion. Whiteness, syndiotacticity, and crystal melting temperature of PVA increased with a decrease of the polymerization temperature. Syndiotactic triad and diad contents of PVA from PVAc polymerized at $0^{circ}C$ were 28% and 53%, respectively. Also, crystal melting temperature of PVA from PVAc obtained at $0^{circ}C$ was 232$^{circ}C$.