Solubilities and Transport Properties of Solvents in Diblock Copolymer Membrane

Absorption kinetic curves of ethanol and benzene in membranes of diblock co-polyurethane containing hydroxyl-poly-butadiene groups(HTPB) and hydroxyl-co-poly-butadiene-acrylonitrile groups(HTBN) at 308.15 K are measured by quartz spring weighing method. Combining transport model based on absorption-adsorption dual modes, the effect of membrane performance such as micro-phase separation of copolyurethane membrane, ratios between soft and hard segments, composition and molecular weight of soft segments on the solubility and transport property of solvent are studied.