Gas transport in polyurethane-polystyrene interpenetrating polymer network membranes. I. Effect of synthesis temperature and molecular structure variation
| Autor: | Sung Lee Doo, Chul Kim Sung, Sung Jung Dae, Ho Kim Tae |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Filtration and Separation
Permeation Biochemistry Miscibility chemistry.chemical_compound Membrane chemistry Chemical engineering Permeability (electromagnetism) Polymer chemistry General Materials Science Polystyrene Interpenetrating polymer network Gas separation Physical and Theoretical Chemistry Polyurethane |
| Zdroj: | Journal of Membrane Science. 60:233-252 |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/s0376-7388(00)81537-9 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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