Stereospecific polymerization of vinyl acetate in fluoroalcohols - Synthesis of syndiotactic poly(vinyl alcohol)

被引：25
|
作者：
Yamada, K
Nakano, T
Okamoto, Y
机构：
[1] Nagoya Univ, Dept Appl Chem, Grad Sch Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
[2] Nagoya Univ, Joint Res Ctr Precis Polymerizat, Grad Sch Engn,Japan Chem Innovat Inst, Chikusa Ku, Nagoya, Aichi 4648603, Japan
来源：
PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES | 1998年 / 74卷 / 03期
关键词：
poly(vinyl alcohol); radical polymerization; tacticity; vinyl acetate; fluoroalcohol; hydrogen-bond;
D O I：
10.2183/pjab.74.46
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The free-radical polymerization of vinyl acetate (VAc) was carried out in various alcoholic solvents. Fluoroalcohols with a lower pKa and higher bulkiness were effective in enhancing the syndiotactic specificity of the polymerization. The polymerization of VAc in perfluoro-tert-butyl alcohol ((CF3)(3)COH) at -78 degrees C led to a dyad syndiotacticity of 72%, which is the highest value reported for the radical polymerization of vinyl esters. Hydrogen-bonding between the acetyl groups of VAc and polymer and the fluoroalcohol molecule may be responsible for the enhancement of the syndiotactic specific propagation.
引用
收藏
页码：46 / 49
页数：4
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