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Evaluation of compatibility of poly(vinyl chloride)/starch acetate blends using simple techniques
Author(s) -
Thakore I. M.,
Desai Sonal,
Sarwade B. D.,
Devi Surekha
Publication year - 1999
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19990314)71:11<1851::aid-app16>3.0.co;2-w
Subject(s) - compatibility (geochemistry) , vinyl acetate , materials science , polymer , vinyl chloride , polymer blend , starch , polyvinyl chloride , solvent , polymer chemistry , flory–huggins solution theory , entropy of mixing , chemical engineering , copolymer , composite material , organic chemistry , chemistry , thermodynamics , engineering , physics , enthalpy
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. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 1851–1861, 1999