Effects of starch moisture on properties of wheat starch/poly(lactic acid) blend containing methylenediphenyl diisocyanate

被引：78

作者：

Wang, H ^{[1
]}

Sun, XZ ^{[1
]}

Seib, P ^{[1
]}

机构：

[1] Kansas State Univ, Dept Grain Sci & Ind, Manhattan, KS 66506 USA

来源：

JOURNAL OF POLYMERS AND THE ENVIRONMENT | 2002年 / 10卷 / 04期

关键词：

biodegradable plastic; poly(lactic acid); starch; methylenediphenyl diisocyanate; water absorption;

D O I：

10.1023/A:1021139903549

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Methylenediphenyl diisocyanate was found to improve the interfacial interaction between poly(lactic acid)(PLA) and granular starch. The objective of this research was to study the effect of starch moisture content on the interfacial interaction of an equal-weight blend of wheat starch and PLA containing 0.5% methylenediphenyl diisocyanate by weight. Starch moisture (10% to 20%) had a negative effect on the interfacial binding between starch and PLA. The tensile strength and elongation of the blend both decreased as starch moisture content increased. At 20% moisture level, the starch granules embedded in the PLA matrix were observed to be swollen, resulting in poor strength properties and high water absorption by the blend.

引用

页码：133 / 138

页数：6

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