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A comparison of methods for assessing the degree of interaction between plasticizers and poly(vinyl chloride)
Author(s) -
Bigg D. C. H.
Publication year - 1975
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/app.1975.070191116
Subject(s) - plasticizer , hildebrand solubility parameter , vinyl chloride , flory–huggins solution theory , solvent , solubility , materials science , polyvinyl chloride , polymer chemistry , degree (music) , swelling , thermodynamics , chemistry , composite material , organic chemistry , polymer , copolymer , physics , acoustics
The Hildebrand solubility parameter δ, the Flory‐Huggins interaction parameter χ, dilute‐solution viscosities, apparent melting temperatures, and the equilibrium swelling of poly(vinyl chloride) (PVC) granules in plasticizer are compared as methods for assessing the degree of PVC–plasticizer interaction. Results from the empirical methods agree well with each other, but not with δ or χ. A quantitative activity parameter α, derived from χ, correlates well with all results other than δ values. A relative order of plasticizer solvent power has been established for nine plasticizers of widely differing structures and activities.