Measurement of transfer constant for butyl acrylate free-radical polymerization

Maeder, S. and Gilbert, R.G. (1998) Measurement of transfer constant for butyl acrylate free-radical polymerization. Macromolecules, 31 14: 4410-4418. doi:10.1021/ma9800515

Author Maeder, S.
Gilbert, R.G.
Title Measurement of transfer constant for butyl acrylate free-radical polymerization
Journal name Macromolecules   Check publisher's open access policy
ISSN 0024-9297
Publication date 1998-07
Sub-type Article (original research)
DOI 10.1021/ma9800515
Volume 31
Issue 14
Start page 4410
End page 4418
Total pages 9
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Formatted abstract
Arrhenius parameters for the transfer constant to monomer (CM) for the free-radical polymerization of butyl acrylate (BA) are determined by a combination of techniques. A seeded emulsion polymerization with conditions designed so that "zero-one" kinetics are obeyed, i.e., where entry of a radical into a particle causes instantaneous termination, such that transfer to monomer can be shown to be the dominant chain-stopping event. The seed comprised small polystyrene particles, which reduces the likelihood of chain transfer to polymer provided the polymer:monomer ratio is sufficiently low. Since the dominant chain-stopping events are then entry and transfer to monomer, CM can then be obtained from the number molecular weight distribution for different initiator concentrations and conversions and isolating the component due to transfer to monomer. The transfer constant so obtained, over the temperature range 50-72 °C, fits CM = (0.016 ±0.003) exp(-(15.2 ± 0.6) kJ mol-1/RT).
Keyword Pulsed-laser Polymerization
Molecular-weight Distributions
Seeded Emulsion Polymerization
Propagation Rate Coefficients
Termination Rate-processes
Low Conversion
Bimolecular Termination
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemistry and Molecular Biosciences
Centre for Nutrition and Food Sciences Publications
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Created: Mon, 07 Mar 2011, 15:52:00 EST