Vapor-liquid equilibria for some concentrated aqueous polymer solutions

Vapor-liquid-equilibrium data were obtained for binary aqueous solutions of six water-soluble linear polymers in the range 70-95 degrees C. A classica l gravimetric sorption method was used to measure the amount of solvent abs orbed as a function of vapor-phase water pressure. Polymers studied were po lyvinylpyrrolidone, polyethyleneoxide, polyvinylalcohol, hydroxyethylcellul ose, polyethylenimine, polymethylvinylether. The experimental data were red uced with Hino's lattice model that distinguished the interactions due to L ondon dispersion forces and those due to hydrogen bonding. (C) 1999 Elsevie r Science Ltd. AU rights reserved.