Kinetics of Nitroxide Mediated Radical Polymerization of Styrene with Unimolecular Initiators |
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| Authors: | Mingxiao Zhou Neil T. McManus Eduardo Vivaldo-Lima Liliane M. F. Lona Alexander Penlidis |
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| Affiliation: | 1. Institute for Polymer Research (IPR), Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada;2. Departamento de Ingeniería Química, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Conjunto E, Ciudad Universitaria, México D.F., CP 04510, Mexico;3. Department of Chemical Processes, School of Chemical Engineering, State University of Campinas (UNICAMP), P.O. Box 6066, Campinas, São Paulo, Brazil |
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| Abstract: | Summary: This study examined the kinetics of nitroxide-mediated radical polymerization of styrene with unimolecular (alkoxyamine) initiators. Control of polymerization rate and polymer molecular weight in unimolecular nitroxide-mediated radical polymerization was studied by looking at the effects of the three main factors: initiator concentration, temperature, and initiator molecular weight on polymerization rate, molecular weight and polydispersity. In addition, the behavior of the unimolecular initiating systems was compared to that of the corresponding bimolecular system. The effective TEMPO concentration and degree of self-initiation of styrene were proved to be significant in dictating magnitudes of molecular weight averages and widths of molecular weight distribution. |
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| Keywords: | alkoxyamine controlled radical kinetics polymerization styrene |
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