Preparation, mechanical properties and thermal stability of poly(L-lactide)/γ-polyglutamate-modified layered double hydroxide nanocomposites

被引：28

作者：

Chiang, Ming-Feng ^{[1
]}

Chen, Erh-Chiang ^{[1
]}

Wu, Tzong-Ming ^{[1
]}

机构：

[1] Natl Chung Hsing Univ, Dept Mat Sci & Engn, Taichung 402, Taiwan

来源：

POLYMER DEGRADATION AND STABILITY | 2012年 / 97卷 / 06期

关键词：

Poly(L-lactide); Layered double hydroxide; Nanocomposite; Thermal degradation; gamma-Polyglutamate; STRUCTURAL-CHARACTERIZATION; MELTING BEHAVIOR; LACTIC-ACID; POLY(L-LACTIDE); CRYSTALLIZATION; POLYMERIZATION; INTERCALATION; CLAY; EXFOLIATION; DEGRADATION;

D O I：

10.1016/j.polymdegradstab.2012.03.011

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

This study reports the preparation and physical properties of biodegradable nanocomposites fabricated using poly(L-lactide) (PLLA) and gamma-polyglutamate-modified magnesium/aluminum layered double hydroxide (gamma-LDH) by solution mixing process. Both X-ray diffraction data and transmission electron microscopy images of PLLA/gamma-LDH nanocomposites indicate that most of the swellable gamma-LDHs were disorderedly distributed into the PLLA matrix. Mechanical properties of the fabricated 5 wt% PLLA/gamma-LDH nanocomposites show significant enhancements in the storage modulus when compared to neat PLLA. Adding more gamma-LDH into PLLA matrix induced a slight decrease in the storage modulus of PLLA/gamma-LDH nanocomposites, probably due to the excessive content of gamma-PGA moleculars with low mechanical properties. The effect of gamma-LDH on thermal degradability of PLLA was also investigated. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：995 / 1001

页数：7

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