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Nitroxide-Mediated Surfactant-Free Emulsion Polymerization of n-Butyl Methacrylate with a Small Amount of Styrene

Nitroxide-Mediated Surfactant-Free Emulsion Polymerization of n-Butyl Methacrylate with a Small Amount of Styrene

Authors :
Mary E. Thomson
Anna-Marie Manley
Scott C. Schmidt
Jason S. Ness
Michael F. Cunningham
Source :
Macromolecules. 43:7958-7963
Publication Year :
2010
Publisher :
American Chemical Society (ACS), 2010.

Abstract

Nitroxide-mediated emulsion polymerization of n-butyl methacrylate (BMA) can produce highly living and well-controlled polymer chains when polymerized in the presence of 10 mol % styrene (St) using a one-pot, differential monomer addition technique. When n-BMA-co-St is polymerized in the presence of a surfactant above the critical micelle concentration, bimodal particle size distributions are obtained, likely as a result of combined micellar and aggregative nucleation mechanisms. This phenomenon is not observed for the more hydrophilic monomer system of methyl methacrylate and styrene. In the absence of surfactant, however, it is possible to prepare stable, monomodal latexes. Using N-tert-butyl-N-(1-diethylphosphono-2,2-dimethylpropyl) nitroxide (SG1), we report the first nitroxide-mediated polymerization of n-butyl methacrylate with a small amount of styrene in a facile surfactant-free emulsion polymerization system. The surfactant-free system requires no separate macroinitiator synthesis step and produc...

Details

ISSN :
15205835 and 00249297
Volume :
43
Database :
OpenAIRE
Journal :
Macromolecules
Accession number :
edsair.doi...........5486436e5caf134fbcfd06207abdd9da
Full Text :
https://doi.org/10.1021/ma1012286