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Influence of temperature on the rheological behavior of polymer mixtures in solution / Simona Morariu in Industrial & engineering chemistry research, Vol. 50 N° 15 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 9451–9455 Titre : Influence of temperature on the rheological behavior of polymer mixtures in solution Type de document : texte imprimé Auteurs : Simona Morariu, Auteur ; Cristina-Eliza Brunchi, Auteur ; Camelia Hulubei, Auteur Année de publication : 2011 Article en page(s) : pp. 9451–9455 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Rheological  behavior  of  polymer Résumé : This article investigates the viscoelastic behavior of poly(acrylonitrile) (PAN) and poly[N-(4-carboxyphenyl)maleimide] (PMI) solutions in dimethylformamide (DMF) in comparison with PMI/PAN/DMF ternary mixtures. Some rheological characteristics, such as viscosity and relaxation time, were investigated as functions of the polymer mixture composition at different temperatures in the range of 0–60 °C. The solutions of each polymer and their mixtures exhibit a Newtonian behavior throughout the studied frequency range. At low temperatures, the behavior of the solutions having high PAN contents in the polymer mixture is influenced by physical gelation of the solution. The activation energy of the flow gives indications about the intensity of polymer–polymer interactions as a function of the polymer mixture composition. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200736e [article] Influence of temperature on the rheological behavior of polymer mixtures in solution [texte imprimé] / Simona Morariu, Auteur ; Cristina-Eliza Brunchi, Auteur ; Camelia Hulubei, Auteur . - 2011 . - pp. 9451–9455. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 9451–9455 Mots-clés : Rheological  behavior  of  polymer Résumé : This article investigates the viscoelastic behavior of poly(acrylonitrile) (PAN) and poly[N-(4-carboxyphenyl)maleimide] (PMI) solutions in dimethylformamide (DMF) in comparison with PMI/PAN/DMF ternary mixtures. Some rheological characteristics, such as viscosity and relaxation time, were investigated as functions of the polymer mixture composition at different temperatures in the range of 0–60 °C. The solutions of each polymer and their mixtures exhibit a Newtonian behavior throughout the studied frequency range. At low temperatures, the behavior of the solutions having high PAN contents in the polymer mixture is influenced by physical gelation of the solution. The activation energy of the flow gives indications about the intensity of polymer–polymer interactions as a function of the polymer mixture composition. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie200736e