Toughening of Poly (L-lactide) with Branched Multiblock Poly (ε-caprolactone)/poly (D-lactide) Copolymers  

作　　者：CHANG Yue CHEN Zhize YANG Yiqi 常悦;陈支泽;杨一奇

机构地区：[1]College of Chemistry,Chemical Engineering and Biotechnology,Donghua University [2]Department of Textiles,Merchandising and Fashion Design,University of Nebraska-Lincoln [3]Department of Biological Systems Engineering and Nebraska Center for Materials and Nanoscience,University of Nebraska-Lincoln

出　　处：《Journal of Donghua University(English Edition)》2018年第5期365-372,共8页东华大学学报（英文版）

基　　金：National Natural Science Foundation of China(No.51503029);National Institute of Food and Agriculture of U.S.Department of Agriculture,U.S.(No.NEB 37-037);Agricultural Research Division at the University of Nebraska-Lincoln,U.S

摘　　要：A total biodegradable elastomer,branched multiblock poly( ε-caprolactone)/poly( D-lactide)( BMCD) was prepared using 3-isocyanatopropyltriethoxysilane( IPTS) as a coupling agent.To improve the toughness of poly( L-lactide)( PLLA),PLLA/BMCD blends were prepared via a simple solvent evaporation method at various BMCD loadings. Tensile test showed that the elongation at break of PLLA blends increased to 50. 97% and104. 55% at the loadings of 5% and 7%( mass fraction) BMCD respectively, with no sacrifice of their biodegradability. This approach allowed for simultaneous control of mechanical and biodegradable properties of PLLA with a few additives in actual production. Furthermore, UV-VIS test showed that the light transmittance of the films at the loadings of 5%( mass fraction)BMCD was almost the same as pure PLLA at 400 nm.A total biodegradable elastomer,branched multiblock poly( ε-caprolactone)/poly( D-lactide)( BMCD) was prepared using 3-isocyanatopropyltriethoxysilane( IPTS) as a coupling agent.To improve the toughness of poly( L-lactide)( PLLA),PLLA/BMCD blends were prepared via a simple solvent evaporation method at various BMCD loadings. Tensile test showed that the elongation at break of PLLA blends increased to 50. 97% and104. 55% at the loadings of 5% and 7%( mass fraction) BMCD respectively, with no sacrifice of their biodegradability. This approach allowed for simultaneous control of mechanical and biodegradable properties of PLLA with a few additives in actual production. Furthermore, UV-VIS test showed that the light transmittance of the films at the loadings of 5%( mass fraction)BMCD was almost the same as pure PLLA at 400 nm.

关 键 词：poly(L-lactide)(PLLA) BRANCHED polymer toughness transparency STEREOCOMPLEX 

分 类 号：TQ316.62[化学工程—高聚物工业]