Chapter 6. Studying the Fundamentals of Radical Polymerization Using ESR in Combination with Controlled Radical Polymerization Methods
- Prof. Dr. Michael Buback2,
- A. M. van Herk3
Published Online: 31 MAY 2007
DOI: 10.1002/9783527610860.ch6
Copyright © 2007 Wiley-VCH Verlag GmbH & Co. KGaA
Book Title
Radical Polymerization: Kinetics and Mechanism, Volume 248
Additional Information
How to Cite
Kajiwara, A. (2007) Studying the Fundamentals of Radical Polymerization Using ESR in Combination with Controlled Radical Polymerization Methods, in Radical Polymerization: Kinetics and Mechanism, Volume 248 (eds M. Buback and A. M. van Herk), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany. doi: 10.1002/9783527610860.ch6
Editor Information
- 2
Institute of Physical Chemistry, Georg-August-University Göttingen, Tammannstrasse 6, D-37077 Göttingen, Germany
- 3
Laboratory for Polymer Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands
Publication History
- Published Online: 31 MAY 2007
- Published Print: 13 APR 2007
Book Series:
ISBN Information
Print ISBN: 9783527320561
Online ISBN: 9783527610860
- Summary
- Chapter
- References
Keywords:
- atom transfer radical polymerization (ATRP);
- ESR/EPR;
- kinetics (polym.);
- radical polymerization
Summary
Electron spin resonance (ESR) spectroscopy can contribute to understanding both the kinetics and mechanism of radical polymerizations. A series of oligo/poly(meth)acrylates were prepared by atom transfer radical polymerization (ATRP) and purified to provide well defined radical precursors. Model radicals, with given chain lengths, were generated by reaction of the terminal halogens with an organotin compound and the radicals were observed by ESR spectroscopy. This combination of ESR with ATRPs ability to prepare well defined radical precursors provided significant new information on the properties of radicals in radical polymerizations. ESR spectra of the model radicals generated from tert-butyl methacrylate precursors, with various chain lengths, showed clear chain length dependent changes and a possibility of differentiating between the chain lengths of observed propagating radicals by ESR. The ESR spectrum of each dimeric, trimeric, tetrameric, and pentameric tert-butyl acrylate model radicals, observed at various temperatures, provided clear experimental evidence of a 1,5-hydrogen shift.