Gas sorption and transport in syndiotactic polystyrene with nanoporous crystalline phase |
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| Authors: | Domenico Larobina Vincenzo Venditto Giuseppe Mensitieri |
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| Affiliation: | a Department of Materials and Production Engineering, University of Naples Federico II, P.le Tecchio 80, 80125 Naples, Italy
b Department of Chemistry, University of Salerno, 84081 Baronissi (Sa), Italy |
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| Abstract: | In this contribution we analyse sorption and transport of several gases in semicrystalline syndiotactic polystyrene with nanoporous crystalline δ form. Investigation was performed on amorphous samples and on samples characterized by different degrees of crystallinity. Sorption isotherms of carbon dioxide, nitrogen and oxygen in the crystalline phase have been determined starting from experimental results obtained for semicrystalline and amorphous samples. Corresponding isosteric heats of sorption were evaluated for the crystalline and amorphous phase. Permeation tests were also performed to gather information on mass transport properties of semicrystalline samples, evaluating average diffusivities of carbon dioxide and oxygen, in the limit of small concentrations as function of degree of crystallinity. |
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| Keywords: | Syndiotactic polystyrene δ form Solubility |
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