Vapour‐liquid equilibria of concentrated poly(styrene‐<i>co</i>‐butadiene) and poly(styrene‐<i>co</i>‐acrylonitrile) solutions

Abstract

Abstract Isopiestic vapor sorption measurements were carried out for concentrated solutions of poly(styrene‐ co ‐butadiene) (SBR) and poly(styrene‐ co ‐acrylonitrile) (SAN) in a number of aromatic solvents in the temperature range of 343 to 398 K. Henry constants were determined by means of inverse gas‐liquid chromatography in the temperature range of 373 K (SBR) or 423 K (SAN) to 473 K, to obtain additional data at infinite dilution for the solvents, and for two of the monomers, styrene and 1,3‐butadiene, in SBR. The chain‐of‐rotators (COR) equation of state model was used to calculate the thermodynamic quantities applying a group‐contribution approach. In general, good agreement is observed between experimental and calculated results.