In situ copolyesters containing poly(L-lactide) and poly(hydroxyalkanoate) units

被引：24
|
作者：
Haynes, Dahlia
Abayasinghe, Nilmini K.
Harrison, Graham M.
Burg, Karen J.
Smith, Dennis W., Jr. [1 ]
机构：
[1] Clemson Univ, Dept Chem, Clemson, SC 29634 USA
[2] Clemson Univ, Dept Chem Engn, Clemson, SC 29634 USA
[3] Clemson Univ, Dept Bioengn, Ctr Adv Engn Finers & Films, Clemson, SC 29634 USA
来源：
BIOMACROMOLECULES | 2007年 / 8卷 / 04期
关键词：
RING-OPENING POLYMERIZATION; MECHANICAL-PROPERTIES; LACTIC-ACID; TRANSESTERIFICATION; COPOLYMERS; POLYMERS; KINETICS; EXCHANGE; BLENDS; BIODEGRADATION;
D O I：
10.1021/bm061018q
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
In situ copolyesters containing polylactide (PLA) and polyhydroxyalkanoate (PHA) segments were obtained via ring-opening polymerization of L-lactide using PHA as a macroinitiator with stannous octoate as catalyst. Incorporation of PHA (20 wt %) into PLA affords a novel copolymer with M-n values ranging from 25 to 50 KDa and low polydispersities of 1.8-2.3. DSC analysis of the copolymer indicates well-defined crystallization and melting transitions different from the homopolymers and corresponding blend. The polymers were characterized by FT-IR, GPC, DSC, optical microscopy, NMR, and TGA. The results show successful reactivity of PHA as a macroinitiator for the ring-opening polymerization of lactide.
引用
收藏
页码：1131 / 1137
页数：7
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