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Influence of the Solvent Quality on the Thermodynamic Behavior of Polymethylphenylsiloxane Solutions / Cristina-Eliza Brunchi in Industrial & engineering chemistry research, Vol. 49 N° 24 (Décembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12740–12746 Titre : Influence of the Solvent Quality on the Thermodynamic Behavior of Polymethylphenylsiloxane Solutions Type de document : texte imprimé Auteurs : Cristina-Eliza Brunchi, Auteur ; Simona Morariu, Auteur ; Maria Cazacu, Auteur Année de publication : 2011 Article en page(s) : pp. 12740–12746 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Solvent  quality  Thermodynamic Résumé : In this work we investigate the effect of the solvent quality on the thermodynamic behavior of the polydimethyldiphenylsiloxane copolymer by using turbidimetry and viscosimetry. The turbidimetric method was used for the determination of the composition of the solvent mixture at the theta point. The experimental data obtained by using the capillary viscometry both in good and theta solvent conditions have been processed by using classical Huggins equation and new Wolf model (2007), which allows the calculation of intrinsic viscosities and other hydrodynamic parameters. The results obtained by using the two approaches were discussed comparatively. The conformational properties of copolymer in solution depend on their molecular structure, which is essentially dominated by the solvent quality, reflecting the balance of the interactions between the polymer chains and each solvent and that between solvent molecules. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1015238 [article] Influence of the Solvent Quality on the Thermodynamic Behavior of Polymethylphenylsiloxane Solutions [texte imprimé] / Cristina-Eliza Brunchi, Auteur ; Simona Morariu, Auteur ; Maria Cazacu, Auteur . - 2011 . - pp. 12740–12746. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12740–12746 Mots-clés : Solvent  quality  Thermodynamic Résumé : In this work we investigate the effect of the solvent quality on the thermodynamic behavior of the polydimethyldiphenylsiloxane copolymer by using turbidimetry and viscosimetry. The turbidimetric method was used for the determination of the composition of the solvent mixture at the theta point. The experimental data obtained by using the capillary viscometry both in good and theta solvent conditions have been processed by using classical Huggins equation and new Wolf model (2007), which allows the calculation of intrinsic viscosities and other hydrodynamic parameters. The results obtained by using the two approaches were discussed comparatively. The conformational properties of copolymer in solution depend on their molecular structure, which is essentially dominated by the solvent quality, reflecting the balance of the interactions between the polymer chains and each solvent and that between solvent molecules. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1015238