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

被引：25

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.

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页码：1131 / 1137

页数：7

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