期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 86, 期 -, 页码 149-156出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2013.07.013
关键词
Polymer matrix composites (PMCs); Environmental degradation; Mechanical properties; Infrared (IR) spectroscopy; Scanning electron microscopy (SEM)
Polylactide (PLA) was grafted on the surface of starch (St) granules to improve the interfacial adhesion between starch granules and PLA matrix in starch/PLA blends. The grafting significantly improved strain at failure values of St-g-PLA/PLA 25:75 blends as compared to starch/PLA 25:75 blends. However, unexpectedly the water resistance of the films significantly deteriorated after the surface grafting. SEM and FTIR analysis showed that St-g-PLA was evenly distributed at the film surface and in the bulk, while unmodified starch was encapsulated inside the PLA matrix. This resulted in rapid leaching of St-g-PLA from the films during aging in water, while the unmodified starch granules were protected by PLA matrix. (C) 2013 Elsevier Ltd. All rights reserved.
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