Emulsion polymerization of butyl acrylate. Kinetics of particle growth

Maxwell, Ian A., Napper, D. H. and Gilbert, R. G. (1987) Emulsion polymerization of butyl acrylate. Kinetics of particle growth. Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 83 1449-1467. doi:10.1039/f19878301449


Author Maxwell, Ian A.
Napper, D. H.
Gilbert, R. G.
Title Emulsion polymerization of butyl acrylate. Kinetics of particle growth
Journal name Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases   Check publisher's open access policy
ISSN 0300-9599
Publication date 1987-01-01
Sub-type Article (original research)
DOI 10.1039/f19878301449
Volume 83
Start page 1449
End page 1467
Total pages 19
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Abstract The kinetics of the seeded emulsion polymerization of butyl acrylate have been studied dilatometrically at 50°C, using both persulphate and γ-radiolysis for initiation. Kinetic data obtained for steady state polymerization and for the approach to (and, for γ-radiolysis, relaxation from) a steady state, gave rate coefficients for entry, exit, termination and propagation, using data-fitting techniques which have been shown to yield unambiguous rate parameters from such results. The system is found to have a high average number of free radicals per article (ranging from 3 to 9). The rate coefficient for exit (desorption) of free radicals from the particles is in accord with transfer/diffusion theory; exited free radicals tend to undergo subsequent re-entry. The entry rate shows that the free-radical capture efficiency is high but significantly less than 100% at the higher initiator concentrations studied; this is quantitatively interpreted by considering competing aqueousphase events. Values for the propagation and termination rate coefficients at 60% weight fraction polymer are reported, the latter being an order of magnitude less than predicted by current theory.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Nutrition and Food Sciences Publications
 
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Created: Tue, 08 Mar 2011, 01:52:35 EST