文献类型：期刊文献

英文题名：Improving the Barrier Properties of Poly(Lactic Acid) by Blending with Poly(Ethylene-Co-Vinyl Alcohol)

作者：Gui, Zongyan[1];Zhang, Weiyang[1];Lu, Chong[1];Cheng, Shujun[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：52

期号：5

起止页码：685

外文期刊名：JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS

收录：;EI(收录号：20132416418503);WOS:【SCI-EXPANDED(收录号:WOS:000319376200004)】；

语种：英文

外文关键词：barrier properties; blend; degradation; morphology; poly(ethylene-co-vinyl alcohol); poly(lactic acid)

摘要：Poly(lactic acid) (PLA)/poly(ethylene-co-vinyl alcohol) (EVOH) blends were prepared via melt blending to improve the barrier properties of PLA. The phase morphologies and final properties (rheological behavior, thermal and dynamical-mechanical features, barrier properties, and mechanical behaviors) of the blends were investigated as a function of the EVOH content. The results indicated that hydroxyl groups of EVOH promoted the degradation of PLA, and thus affected the viscosities and morphologies of the resulting blends. The intrinsic viscosities of PLA in the blends decreased with the content of EVOH. The PLA and EVOH presented typical phase-separated morphologies, with a relatively small domain size of the EVOH phase. The EVOH enhanced the cold-crystallization behavior of PLA. The barrier properties to water vapor and oxygen increased linearly with increasing EVOH content.