The effects of gamma-irradiation on the structure, thermal resistance and mechanical properties of the PLA/EVOH blends

被引：28

作者：

Liu, Meihua ^{[1
,2
]}

Yin, Yuan ^{[1
]}

Fan, Zhipeng ^{[5
]}

Zheng, Xiaowei ^{[1
]}

Shen, Shirley ^{[3
]}

Deng, Pengyang ^{[1
]}

Zheng, Chunbai ^{[1
]}

Teng, Hong ^{[4
]}

Zhang, Wanxi ^{[2
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Jilin, Peoples R China

[2] Jilin Univ, Dept Mat Sci & Engn, Changchun 130025, Jilin, Peoples R China

[3] CSIRO Mat Sci & Engn, Highett, Vic 3190, Australia

[4] Jilin Univ, Hosp 2, Dept Obstet & Gynecol, Changchun 130041, Jilin, Peoples R China

[5] Zhengzhou Yutong Bus Co Ltd, Zhengzhou 450000, Henan, Peoples R China

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2012年 / 274卷

基金：

中国国家自然科学基金;

关键词：

Polylactic acid; Poly(ethylene-co-vinyl alcohol); Irradiation; HDT; RADIATION CROSS-LINKING; POLYLACTIC ACID; POLY(L-LACTIC ACID); POLYMERS; PLA; DEGRADATION; IMPROVEMENT; COMPOSITES; MORPHOLOGY; EVOH;

D O I：

10.1016/j.nimb.2011.12.020

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Polylactic acid (PLA) is as a well-known biodegradable polymer with strong potential for extending its applications into the commodity industry, which is still limited by its relative low heat distortion temperature (HDT). In this paper, poly(ethylene-co-vinyl alcohol) (EVOH) was blended with PLA by melt blending and followed by a gamma-irradiation at various absorbed doses in the presence of a multifunctional monomer, triallyl isocyanurate (TAIC). The results show that the enhanced irradiation is an effective method for improving the mechanical properties and HDT of PLA/EVOH blends. Remarkably, the HDTs of the irradiated blends have dramatically increased to 140 degrees C, double the value of neat PLA (70 degrees C). The content of TAIC and the absorbed dose of irradiation were found to play important roles in the enhancement. Gel extraction, scanning electronic microscopy (SEM) and Fourier Transform Infrared (FTIR) spectroscopy analyses also demonstrate that new co-crosslinked networks have been formed in the irradiated PLA/EVOH blends. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：139 / 144

页数：6

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