Solvent activities in solutions of star and linear poly(ethylene oxide) and polystyrene

[摘要] Solvent activities were measured using a gravimetric method in the range 48-70 degrees C. The polymers were: 15-arm, 20-arm star and linear poly(ethylene oxide), and 8-arm star and linear polystyrene. The solvents were acetone, chloroform and cyclohexane. In the concentrated regime, to 0.5 solvent weight fraction, there is no significant effect of polymer structure on solvent activities. (C) 1998 Elsevier Science Ltd. All rights reserved.

[发布日期] 1998-12-01

[关键词] vapour-liquid equilibrium;star polymer;gravimetric method