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On the solubility parameter of polar polymers
Author(s) -
Utracki Lechoslaw A.
Publication year - 1972
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.1972.070160511
Subject(s) - hildebrand solubility parameter , polybutadiene , solvent , polar , flory–huggins solution theory , solubility , thermodynamics , polymer , intrinsic viscosity , materials science , miscibility , methacrylate , viscosity , polymer chemistry , molecule , chemistry , copolymer , organic chemistry , physics , astronomy
The binary cluster integral, β, was computed from intrinsic viscosity data. Subtracting from β the polar contribution, β e , calculated from YRCR theory, 9 the nonpolar interaction parameter, β n , was found. The calculations were performed for poly(vinylacetate) and poly(methyl methacrylate), each in 16 solvents. The correlation between β n and the solvent solubility parameter, δ 1 , was found to be similar to that reported 8,17 for solutions of natural rubber, cis ‐polybutadiene and for poly(vinyl chloride). This correlation can be crudely approximated by the formula\documentclass{article}\pagestyle{empty}\begin{document}$ \beta _n = E - F\left| {\delta _1 - \delta _m } \right| $\end{document} where E and F are functions of the ill‐defined symmetry of the solvent molecule and δ m is the δ 1 value for the local maximum of the function. At δ 1 = constant, the more spherical is the molecule, the higher is the β n value. It was shown that for most cases separation of the solvent into two classes (linear and nonlinear) is sufficient. This β n behavior finds support in the Funk and Prausnitz 6 report on aromatic–saturated hydrocarbon mixtures and in the theoretical calculations of Huggins. 21,22