Effect of propylation of starch with different degrees of substitution on the properties and characteristics of starch-low density polyethylene blend films
Article first published online: 15 JUN 2011
Copyright © 2011 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 122, Issue 4, pages 2197–2208, 15 November 2011
How to Cite
Garg, S. and Jana, A. K. (2011), Effect of propylation of starch with different degrees of substitution on the properties and characteristics of starch-low density polyethylene blend films. J. Appl. Polym. Sci., 122: 2197–2208. doi: 10.1002/app.34279
- Issue published online: 5 AUG 2011
- Article first published online: 15 JUN 2011
- Manuscript Accepted: 6 FEB 2011
- Manuscript Received: 8 OCT 2010
- propylated starch;
- starch-LDPE blend films;
- mechanical properties;
- water absorption capacity
Corn starch was modified by propylation and degree of substitution (DS) of four starch modifications were 0.61, 1.56, 2.27, and 2.51. Different films were prepared by blending native and propylated starch with low-density polyethylene (LDPE). The mechanical properties, thermal properties, water absorption capacity, and biodegradability of the blend films varied with the quantity of starch as well as DS. Tensile strength, elongation, and melt flow index of propylated starch blend films were higher compared to the corresponding native starch blend film. These properties improved with increase in DS from 1.56 to 2.51. Propylated starch blend films were found thermally stable than native starch blend films. There was a decrease in water absorption capacity for the films containing propylated starch at high DS. Enzymatic and soil burial degradation results showed that biodegradability of starch-LDPE films increased with the increase in the starch concentration but it decreased with increase in the DS. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011.