Plasticization of poly(lactic acid) through blending, with oligomers of lactic acid: Effect of the physical aging on properties
Plasticization of poly(lactic acid) through blending, with oligomers of lactic acid: Effect of the physical aging on properties
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DOI：
10.1016/j.eurpolymj.2015.02.040
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发表时间：
2015-05-01
影响因子：
6
通讯作者：
Errico, Maria Emanuela
中科院分区：
文献类型：
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作者：
Avolio, Roberto;Castaldo, Rachele;Errico, Maria Emanuela
采用羧基封端（OLA-COOH）或羟基封端（OLA-OH）的两种乳酸低聚物（OLAs）来调节聚乳酸的物理和机械性能。通过熔融混合制备OLA。测试了材料的机械、热和传输性能作为奥拉官能部分和共混物组成的函数。此外，物理老化对共混物的结构和性能的影响进行了研究，通过存储样品在受控的温度和湿度条件下，长达8周。OLAs显着影响PLA的机械性能;共混物显示出有趣的延展性，即使在老化后，这表明它们作为柔性薄膜的用途。此外，共混物的气体传输和总迁移性能适合于包装应用。(C)2015爱思唯尔有限公司版权所有。
Two oligomers of lactic acid (OLAs), carboxyl (OLA-COOH) or hydroxyl (OLA-OH) end capped, were employed to modulate physical and mechanical properties of poly(lactic acid), PIA Blends up to 25 wt.% by weight of OLAs were prepared by melt mixing. Mechanical, thermal and transport properties of the materials were tested as a function of OLA functional moieties and blend composition. Moreover, the effect of physical aging on structure and properties of blends was studied by storing the samples in controlled temperature and humidity conditions, up to 8 weeks.OLAs significantly affect mechanical properties of PLA; blends showed an interesting ductility even after aging, suggesting their use as flexible films. Moreover, gas transport and total migration properties of blends are suitable for packaging applications. (C) 2015 Elsevier Ltd. All rights reserved.