COMPATIBILITY AND BIODEGRADABILITY OF BLENDSOF STARCH CINNAMATE WITH VARIOUS POLYMERS
Title:
COMPATIBILITY AND BIODEGRADABILITY OF BLENDSOF STARCH CINNAMATE WITH VARIOUS POLYMERS
Author:
Thakore, I. M. Desai, Sonal Devi, Surekha
Appeared in:
International journal of polymeric materials
Paging:
Volume 52 (2003) nr. 8 pages 725-748
Year:
2003-08
Contents:
The compatibility of blends of starch cinnamate (StCn) with polyvinyl chloride (PVC), polystyrene (PS), and styrene acrylonitrile copolymer (SAN) has been examined through viscometry at 30°C. The results of the three systems are compared with the already reported PMMA/StCn system. From the intrinsic viscosity, relative viscosity, reduced viscosity, and density measurements the PVC/StCn and SAN/StCn blends were found to be compatible while PS/StCn blend was found to be incompatible. The compatibility of the blends was also confirmed by SEM analysis. The compatibility of these blends based on heat of mixing and polymer-polymer interaction parameter was also examined. Blends were observed to be compatible on the basis of heat of mixing theory but not on the basis of polymer - polymer interaction parameters. Biodegradation studies of compatible blends containing 30% StCn showed 13%, 15%, 18%, and 23% weight loss in case of PMMA, SAN, and PVC blends after 120 days.