Gas transport in polyurethane-polystyrene interpenetrating polymer network membrane. 1. Effect of synthsis temperature and molecular structure variation

The gas (oxygen and nitrogen) transport characteristics of the interpenetrating polymer network (IPN) membranes of polyurethane/polystyrene were studied. The effect of synthesis temperature, composition, molecular weight of the polyol and aromatic content (of MDI, TDI and HDI) on the gas permeability were analyzed. In the IPN synthesis, first polyurethane was polymerized thermally, and then polystyrene was polymerized by photolytic methods at different temperatures. The permeability coefficient decreased and the separation factor increased with decreasing synthesis temperature due to the miscibility increase. The permeability coefficient showed a minimum value and the separation factor showed a maximum value at ca. 25 wt.% polyurethane composition. The permeability coefficient decreased and the separation factor increased with increasing aromatic content in polyurethane component. The morphology and density behavior of the IPN's agreed well with the permeability data. The tensile strength of the membrane increased with decreasing synthesis temperature and with increasing crosslink density and polystyrene content.
Publisher
Elsevier Science Bv
Issue Date
1991-04
Language
ENG
Keywords

HIGH-PRESSURE; TG-BEHAVIOR; LINEAR BLENDS; IPNS; MORPHOLOGY; PERMEATION; POLYDIMETHYLSILOXANE

Citation

JOURNAL OF MEMBRANE SCIENCE, v.60, no.2-3, pp.233 - 252

ISSN
0376-7388
URI
http://hdl.handle.net/10203/2117
Appears in Collection
CBE-Journal Papers(저널논문)
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