Porous biodegradable blends of poly(L-lactic poly(ε-caprolactone):: polyester acid) and physical properties, morphology, and biodegradation

被引：36

作者：

Tsuji, Hideto ^{[1
]}

Horikawa, Gen ^{[1
]}

机构：

[1] Toyohashi Univ Technol, Dept Ecol Engn, Fac Engn, Toyohashi, Aichi 4418580, Japan

来源：

POLYMER INTERNATIONAL | 2007年 / 56卷 / 02期

关键词：

poly(L-lactic acid); poly (epsilon-caprolactone); poly(ethylene glycol); porous polymer blends; physical properties; enzymatic degradation;

D O I：

10.1002/pi.2150

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(L-lactic acid) (PLLA), poly(epsilon-caprolactone) (PCL), and their films without or blended with 50 wt% poly(ethylene glycol) (PEG) were prepared by solution casting. Porous films were obtained by water-extraction of PEG from solution-cast phase-separated PLLA-blend-PCL-blend-PEG films. The effects of PLLA/PCL ratio on the morphology of the porous films and the effects of PLLA/PCL ratio and pores on the physical properties and biodegradability of the films were investigated. The pore size of the blend films decreased with increasing PLLA/PCL ratio. Polymer blending and pore formation gave biodegradable PLLA-blend-PCL materials with a wide variety of tensile properties with Young's modulus in the range of 0.07-1.4 GPa and elongation at break in the range 3-380%. Pore formation markedly increased the PLLA crystallinity of porous films, except for low PLLA/PCL ratio. Polymer blending as well as pore formation enhanced the enzymatic degradation of biodegradable polyester blends. (c) 2006 Society of Chemical Industry.

引用

页码：258 / 266

页数：9

共 44 条

[1] Poly(D,L-lactic acid)/poly (ε-caprolactone) blend membranes:: preparation and morphological characterisation [J].