Synthesis of Polylactide-b-Poly (Dimethyl Siloxane) Block Copolymers and Their Blends with Pure Polylactide

被引：21

作者：

Hazer, Baki ^{[1
]}

Baysal, Bahattin M. ^{[2
]}

Koseoglu, Ayse G. ^{[1
]}

Besirli, Necati ^{[3
]}

Taskin, Elif ^{[3
]}

机构：

[1] Zonguldak Karaelmas Univ, Dept Chem, TR-67100 Zonguldak, Turkey

[2] Bogazici Univ, Dept Chem Engn, TR-81815 Bebek, Turkey

[3] Uludag Univ, Dept Chem, TR-16059 Bursa, Turkey

来源：

JOURNAL OF POLYMERS AND THE ENVIRONMENT | 2012年 / 20卷 / 02期

关键词：

Poly(lactide); Poly(dimethyl siloxane); Block copolymer; Transesterification; Blends of polymers; RING-OPENING POLYMERIZATION; EPSILON-CAPROLACTONE; METHYL-METHACRYLATE; RENEWABLE RESOURCES; TRIBLOCK COPOLYMERS; GRAFT-COPOLYMERS; L-LACTIDE; DEGRADATION; POLY(EPSILON-CAPROLACTONE); CRYSTALLIZATION;

D O I：

10.1007/s10924-011-0406-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The synthesis of polylactide (PLA)-b-poly (dimethyl siloxane) (PDMS) linear block copolymers and their use in blends with pure-PLA are described. PLA-b-PDMS linear block copolymers were obtained by the transesterification reaction in chloroform solution between poly(dimethyl siloxane) bis (2-aminopropyl ether) (molecular weight 2,000 Da) with PLA in the presence of stannous octoate. Molecular weights (Mw) of the block copolymers were varied from 53,800 to 63,600 Da while that of pristine PLA was 73,600 Da. The copolymers obtained were purified by fractional precipitation and then characterized by H-1 NMR, FTIR, GPC, viscometry and DSC techniques. Blends of pure PLA with PLA-b-PDMS block copolymers displayed improved elastic properties (elongation up to 140%) compared to pure PLA (elongation similar to 9%). Thermal, mechanical and morphological characterization of the blends were also conducted.

引用

页码：477 / 484

页数：8

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