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Evaluation of compatibility of poly(vinyl chloride)/starch acetate blends using simple techniques

✍ Scribed by I. M. Thakore; Sonal Desai; B. D. Sarwade; Surekha Devi

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
297 KB
Volume
71
Category
Article
ISSN
0021-8995

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✦ Synopsis

Solution blending of poly(vinyl chloride) (PVC) and starch acetate (d.s. 2.5) synthesized in our laboratory was carried out in 1,4-dioxane. The compatibility of these blends based on the heat of mixing and the free-energy concept was examined theoretically. Experimental evidence for the compatibility of these blends was derived from viscometric and ultrasonic studies and density measurements. Interaction parameters suggest that polymer-polymer interaction is greater than polymer-solvent interaction in the blends under study. All the experimental and theoretical evidence show that the blends are incompatible at the compositions studied. Morphological studies showed a uniform dispersion of starch acetate in PVC.

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