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http://dx.doi.org/10.7317/pk.2013.37.5.606

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

Yim, Jin-Heong (Division of Advanced Materials Engineering, Kongju National University)
Kim, Da Hee (Department of Chemical Engineering, Kongju National University)
Ko, Young Soo (Department of Chemical Engineering, Kongju National University)
Publication Information
Polymer(Korea) / v.37, no.5, 2013 , pp. 606-612 More about this Journal
Abstract
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 1H NMR. The OH group of glycidol in Gly-PLA was absent according to the $^1H$ 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.
Keywords
L-lactide; glycidol; aluminum isopropoxide; initiator;
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Times Cited By KSCI : 3  (Citation Analysis)
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