| Abstract: | A series of poly(hexamethylene sebacate) (PHS), with molecular weight in a range of 890–2200, based polyurethanes (PU), were synthesized by solution polymerization with different kinds of isocyanate and chain extender and two kinds of polymerization methods. All the PHS‐based PU membranes exhibited selectivity towards styrene during the pervaporation of styrene–ethylbenzene mixtures, and the properties of sorption and pervaporation were related to the composition of the PU membranes. Membranes with a low hard‐segment content and by two‐stage polymerization method exhibited high permselectivity. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 74: 753–761, 1999 |
