Title of article
Improved dispersion of grafted starch granules leads to lower water resistance for starch-g-PLA/PLA composites
Author/Authors
Xi Yang، نويسنده , , Anna Finne-Wistrand، نويسنده , , Minna Hakkarainen، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2013
Pages
8
From page
149
To page
156
Abstract
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.
Keywords
A. Polymer–matrix composites (PMCs) , B. Mechanical properties , D. Scanning electron microscopy (SEM) , D. Infrared (IR) spectroscopy , B. Environmental degradation
Journal title
COMPOSITES SCIENCE AND TECHNOLOGY
Serial Year
2013
Journal title
COMPOSITES SCIENCE AND TECHNOLOGY
Record number
1044356
Link To Document