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Rheo-Raman / Marie-Claire Chevrel in Industrial & engineering chemistry research, Vol. 51 N° 49 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 49 (Décembre 2012) . - pp. 16151–16156 Titre : Rheo-Raman : A Promising Technique for In Situ Monitoring of Polymerization Reactions in Solution Type de document : texte imprimé Auteurs : Marie-Claire Chevrel, Auteur ; Sandrine Hoppe, Auteur ; Laurent Falk, Auteur Année de publication : 2013 Article en page(s) : pp. 16151–16156 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Polymerization  Acrylic  acid Résumé : The use of a laboratory-made rheo-Raman device for continuous in situ monitoring of free-radical polymerization of acrylic acid in aqueous solution is reported for the first time. Combining a mixer-type rheometer with a quartz outer cylinder to a Raman spectrometer, this original experimental device has allowed us to overcome three current challenges of polymerization reaction monitoring. First, monomer conversion, polymer formation, and viscosity of reaction medium were continuously monitored with well-defined conditions (composition, temperature, and flow), using Couette analogy. Second, direct correlation between macroscopic viscosity and medium composition was established (accounting for the continuous variation of molar mass distribution). Third, using a mixer-type rheometer provided scalable results, in terms of stirring conditions. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302054k [article] Rheo-Raman : A Promising Technique for In Situ Monitoring of Polymerization Reactions in Solution [texte imprimé] / Marie-Claire Chevrel, Auteur ; Sandrine Hoppe, Auteur ; Laurent Falk, Auteur . - 2013 . - pp. 16151–16156. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 49 (Décembre 2012) . - pp. 16151–16156 Mots-clés : Polymerization  Acrylic  acid Résumé : The use of a laboratory-made rheo-Raman device for continuous in situ monitoring of free-radical polymerization of acrylic acid in aqueous solution is reported for the first time. Combining a mixer-type rheometer with a quartz outer cylinder to a Raman spectrometer, this original experimental device has allowed us to overcome three current challenges of polymerization reaction monitoring. First, monomer conversion, polymer formation, and viscosity of reaction medium were continuously monitored with well-defined conditions (composition, temperature, and flow), using Couette analogy. Second, direct correlation between macroscopic viscosity and medium composition was established (accounting for the continuous variation of molar mass distribution). Third, using a mixer-type rheometer provided scalable results, in terms of stirring conditions. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302054k