Nitroxide-mediated radical polymerization of acrylamide in water solution |
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Authors: | Bruno Grassl,Gé rald Clisson,Abdel Khoukh,Laurent Billon |
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Affiliation: | Equipe de Physique et Chimie des Polymères IPREM, EPCP CNRS UMR 5254, Hélioparc Pau Pyrénées - 2 Avenue du Président Angot, 64053 Pau cedex 09, France |
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Abstract: | This study shows that reasonably controlled nitroxide-mediated polymerization of acrylamide is achieved in pure water solution at 120 °C and high concentration (40 wt%), using a combination of a conventional hydrosoluble radical initiator (Vazo56) and a β-phosphonylated nitroxide, SG1. Moreover, some chain extensions can be performed from a polyacrylamide macroinitiator. Under these experimental conditions, we have demonstrated the conservation of the acrylamide structure without hydrolysis side reactions. The physico-chemical characterizations of polymers obtained from this method demonstrates that the controlled growing chain arises as a star-like shape from the hydrophobic core composed of SG1-functionalized polyacrylamide in the presence of a slight excess of SG1. |
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Keywords: | Acrylamide Controlled/living polymerization |
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