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Solubility and diffusivity of carbon dioxide in solid-state isotactic polypropylene by the pressure−decay method / Da-chao Li in Industrial & engineering chemistry research, Vol. 48 N° 15 (Août 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 7117–7124 Titre : Solubility and diffusivity of carbon dioxide in solid-state isotactic polypropylene by the pressure−decay method Type de document : texte imprimé Auteurs : Da-chao Li, Auteur ; Tao Liu, Auteur ; Ling Zhao, Auteur Année de publication : 2009 Article en page(s) : pp. 7117–7124 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Carbon  dioxide  Solid-state  isotactic  polypropylene  Pressure−decay  method Résumé : The solubility and diffusivity of carbon dioxide (CO2) in the solid-state isotactic polypropylene (iPP) were studied by using the pressure−decay method at temperatures of 373.15, 398.15, and 423.15 K and pressures ranging from 1 to 15 MPa. The solubilities of CO2 in the solid-state and amorphous regions of iPP were both obtained. They increased almost linearly with increasing pressure and decreased with increasing temperature. The Sanchez−Lacombe equation of state (S-L EOS) correlated the solubility in the amorphous regions of the solid-state iPP within 3% average relative deviation in conjunction with a temperature-dependent interaction parameter. The diffusion coefficient of CO2 in the solid-state iPP showed a weak concentration dependence and had an order of magnitude of 10−10−10−9 m2/s in the solid-state iPP. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8019483 [article] Solubility and diffusivity of carbon dioxide in solid-state isotactic polypropylene by the pressure−decay method [texte imprimé] / Da-chao Li, Auteur ; Tao Liu, Auteur ; Ling Zhao, Auteur . - 2009 . - pp. 7117–7124. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 7117–7124 Mots-clés : Carbon  dioxide  Solid-state  isotactic  polypropylene  Pressure−decay  method Résumé : The solubility and diffusivity of carbon dioxide (CO2) in the solid-state isotactic polypropylene (iPP) were studied by using the pressure−decay method at temperatures of 373.15, 398.15, and 423.15 K and pressures ranging from 1 to 15 MPa. The solubilities of CO2 in the solid-state and amorphous regions of iPP were both obtained. They increased almost linearly with increasing pressure and decreased with increasing temperature. The Sanchez−Lacombe equation of state (S-L EOS) correlated the solubility in the amorphous regions of the solid-state iPP within 3% average relative deviation in conjunction with a temperature-dependent interaction parameter. The diffusion coefficient of CO2 in the solid-state iPP showed a weak concentration dependence and had an order of magnitude of 10−10−10−9 m2/s in the solid-state iPP. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8019483