Effect of annealing on the mechanical properties of PLA/PCL and PLA/PCL/LTI polymer blends

被引：103
作者：
Takayama, Tetsuo [1 ]
Todo, Mitsugu [2 ]
Tsuji, Hideto [3 ]
机构：
[1] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Fukuoka 8168580, Japan
[2] Kyushu Univ, Appl Mech Res Inst, Fukuoka 8168580, Japan
[3] Toyohashi Univ Technol, Dept Environm & Life Sci, Aichi 4418580, Japan
来源：
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS | 2011年 / 4卷 / 03期
关键词：
Biodegradable polymer; Polymer blend; Fracture mechanism; BIODEGRADABLE POLY(LACTIC ACID); FRACTURE-TOUGHNESS; ALIPHATIC POLYESTERS; PHYSICAL-PROPERTIES; LOADING-RATE; BEHAVIOR; POLY(EPSILON-CAPROLACTONE); POLY(L-LACTIDE); CRYSTALLIZATION; MORPHOLOGIES;
D O I：
10.1016/j.jmbbm.2010.10.003
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
The effects of annealing on the mechanical properties of polymer blends of poly(lactic acid) (PLA) and poly(epsilon-caprolactone) (PCL) were investigated. The bending strength and modulus of PLA/PCL tend to increase due to crystallization of the PLA phase by annealing. The mode I fracture energy, J(in), of PLA/PCL decreases dramatically due to the suppression of the ductile deformation of the spherical PCL phase by annealing. The immiscibility of PLA and PCL can be improved by adding lysine triisocyanate (LTI) as a result of additional polymerization. The phase transformation due to LTI addition reduces the size of the spherical PCL phase, resulting in higher fracture energy. An annealing process applied to PLA/PCL/LTI further strengthens the microstructure, resulting in effective improvement of the fracture energy. (C) 2010 Elsevier Ltd. All rights reserved.
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页码：255 / 260
页数：6
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