caa a22 4500 445385049 CHVBK 20180317143029.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10924-011-0298-0 doi (NATIONALLICENCE)springer-10.1007/s10924-011-0298-0 Wu Xue Institute of Molecular Medicine, Huaqiao University, 362021, Quanzhou, Fujian Province, China aut Effect of Glycerin and Starch Crosslinking on Molecular Compatibility of Biodegradable Poly(lactic acid)-Starch Composites [Elektronische Daten] [Xue Wu] Poly(lactic acid) (PLA) is a biodegradable material. However, PLA is relatively cost effective. Blending starch with PLA is one of the promising efforts because starch is a widely distributed and inexpensive product. PLA and starch were blended using a rheometer to form composites in this report. Glycerin was added into the blends to make the mixture molecular compatible and more homogeneous. The starch was crosslinked using epichlorohydrin to improve the compatibility of starch with PLA. Two series of composite were fabricated. One was PLA and the crosslinked starch containing 32wt% glycerin. In this group, the crosslinking degree of the modified starch was varied. The second group was PLA and non-crosslinked starch with varied amount of glycerin added. Micro-structure of the blending composites was observed using a SEM to view the homogeneity of the mixture. The SEM pictures indicated that the compatibility of PLA and starch molecules was poor. The addition of glycerin can change the compatibility of PLA and starch. The higher the glycerin content in the composites, the better the compatibility between PLA and starch. Furthermore, when the starch was crosslinked by epichlorohydrin, the compatibility of PLA and starch can be greatly improved. The compatibility increases with the increase of crosslinking degree. This is due to the change of hydrophilicity of starch because the hydroxyl groups on the starch molecules were crosslinked into ether groups by the epichlorohydrin molecules. Springer Science+Business Media, LLC, 2011 Poly(lactic acid) nationallicence Starch nationallicence Composites nationallicence Compatibility nationallicence Micro-structure nationallicence Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/4(2011-12-01), 912-917 1566-2543 19:4<912 2011 19 10924 https://doi.org/10.1007/s10924-011-0298-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10924-011-0298-0 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Wu Xue Institute of Molecular Medicine, Huaqiao University, 362021, Quanzhou, Fujian Province, China aut NATIONALLICENCE 773 0- Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/4(2011-12-01), 912-917 1566-2543 19:4<912 2011 19 10924 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer