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Aqueous Polymerization of Methyl Methacrylate Initiated by Pyridine-Sulfur Dioxide Complex
P GHOSH, S BISWAS
Published in -
1981
Volume: 16
   
Issue: 5
Pages: 1033 - 1045
Abstract
The aqueous polymerization of MMA was studied kinetically at 40° C using low concentrations of Py-S02 complex as initiator. For [Py-SO2] < 2 x 10-2 mol/L, Rpα [Py-SO2]0.5 [M]1.5 and for [Py-SO2] > 2 x 10-2 mol/L, Rpα[Py-SO2]0.0[M]1.08. Polymerization is considered to proceed by a radical mechanism. The radical generation or the initiation step is believed to proceed through equilibrium complexation between the Py-SO2 complex and monomer molecules. For [Py-SO2] < 2 x 10-2 mol/L, the polymerization is characterized by bimolecular termination. Above this [Py-SO2], chain termination by a degradative initiator transfer process assumes prominence. © 1981, Taylor & Francis Group, LLC. All rights reserved.
About the journal
JournalJournal of Macromolecular Science: Part A - Chemistry
Publisher-
ISSN0022-233X