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Thermodynamic interactions of solvents with styrene–butadiene–styrene triblock copolymers
Author(s) -
Romdhane I. Hadj,
Plana A.,
Hwang S.,
Danner R. P.
Publication year - 1992
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.1992.070451120
Subject(s) - hildebrand solubility parameter , copolymer , flory–huggins solution theory , solvent , styrene , styrene butadiene , solubility , thermodynamics , materials science , inverse gas chromatography , dilution , entropy of mixing , polymer chemistry , polymer , thermoplastic elastomer , chemistry , organic chemistry , enthalpy , composite material , physics
Fundamental thermodynamic interaction data for various solvents with two styrene–butadiene–styrene triblock copolymers (Kraton D‐1101 and Kraton D‐1300X) have been collected by the use of inverse gas chromatography at infinite dilution. Experimental results are presented for nine D‐1101/solvent systems and nine D‐1300X/solvent systems at 308, 328. and 348 K. Weight‐fraction activity coefficients and Flory–Huggins χ interaction parameters have been calculated from the retention volumes. The χ parameter is used as a measure of the strength of interaction and therefore as a guide in the prediction of polymer–solvent compatibility. In addition, partial molar heats of mixing, Δ H m ∞ , and heats of solution, Δ H s , were determined. The Hildebrand–Scatchard solubility theory was combined with the Flory theory in order to estimate the solubility parameter of the thermoplastic rubbers at the three different temperatures.