Ring-Opening Polymerization of L-lactide with Glycidol as Initiator

被引：2
|
作者：
Yim, Jin-Heong [1 ]
Kim, Da Hee [2 ]
Ko, Young Soo [2 ]
机构：
[1] Kongju Natl Univ, Div Adv Mat Engn, Chungnam 330717, South Korea
[2] Kongju Natl Univ, Dept Chem Engn, Chungnam 330717, South Korea
来源：
POLYMER-KOREA | 2013年 / 37卷 / 05期
关键词：
L-lactide; glycidol; aluminum isopropoxide; initiator;
D O I：
10.7317/pk.2013.37.5.606
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Glycidol-poly(lactide) (Gly-PLA) were synthesized via L-lactide ring opening polymerization with glycidol as an initiator and Al(O-i-Pr)(3) catalyst. The structure of Gly-PLA was analyzed and successfully confirmed by H-1 NMR. The OH group of glycidol in Gly-PLA was absent according to the H-1 NMR analysis, indicating that the terminal OH group of glycidol successfully served as an initiator in the L-lactide polymerization. The solution and bulk polymerizations of L-lactide with glycidol were performed to examine the effect of L-lactide/glycidol molar ratio, polymerization temperature and time on the molecular characteristics of Gly-PLA. The conversion and molecular weight increased with an increase in L-lactide/glycidol molar ratio. Gly-PLA showed the bimodal type DSC curve. The low T-m peak of low molecular weight reduced but the high T-m peak of high molecular weight increased as L-lactide/glycidol molar ratio increased.
引用
收藏
页码：606 / 612
页数：7
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