Microwave-Assisted Nitroxide-Mediated Radical Polymerization of Acrylamide in Aqueous SolutionReportar como inadecuado




Microwave-Assisted Nitroxide-Mediated Radical Polymerization of Acrylamide in Aqueous Solution - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

1 IPREM - Institut Pluridisciplinaire de Recherche sur l-Environnement et les Matériaux 2 PCP - Physico-chimie des polymères

Abstract : The present work describes a combination of microwave irradiation as a heating source and water as a solvent for carrying out a living-controlled polymerization of acrylamide. Reasonable results were obtained for a nitroxide-mediated radical polymerization NMP with a combination of a conventional hydrosoluble radical initiator and a phosphonylated nitroxide SG1. The microwave enhancement of the polymerization was found to depend on the mode of irradiation, i.e., either a DYN mode or an SPS mode. The former mode corresponded to a dynamic control of the temperature by way of a high initial microwave power, and in this case, no specific microwave effect was observed. On the other hand, in the SPS mode, which is a pulsed power mode, the result showed a strong acceleration of the polymerization process > 50 times without the loss of the living-controlled polymerization characteristics which is relevant with a re-initiation of the polyacrylamide macroinitiator even after 100% of conversion.

Keywords : microwave acrylamide controlled-living polymerization Nitroxide Mediated Polymerization





Autor: Julien Rigolini - Bruno Grassl - Laurent Billon - Stephanie Reynaud - Olivier F.X. Donard -

Fuente: https://hal.archives-ouvertes.fr/



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