Retardation by oxygen in emulsion polymerisation

De Bruyn, H., Gilbert, R. G. and Hawkett, B. S. (2000) Retardation by oxygen in emulsion polymerisation. Polymer, 41 24: 8633-8639.

Author De Bruyn, H.
Gilbert, R. G.
Hawkett, B. S.
Title Retardation by oxygen in emulsion polymerisation
Journal name Polymer   Check publisher's open access policy
ISSN 0032-3861
Publication date 2000-11
Sub-type Article (original research)
Volume 41
Issue 24
Start page 8633
End page 8639
Total pages 7
Place of publication Oxford, United Kingdom
Publisher Elsevier
Language eng
Abstract The extended retardation of the free-radical seeded emulsion polymerisation of vinyl acetate by oxygen has been modelled and fitted to experimental data. It is argued that the unusually long retardation observed in this system is due to the high entry efficiency of the aqueous-phase oligomeric radicals which allows latex particles to compete with dissolved oxygen for these initiating radicals. This, in the case of VAc, is due to the high value of the product of the propagation rate coefficient and the water solubility. As oxygen is consumed the competition increasingly favours entry of initiating radicals into particles and the polymerisation rate gradually increases. The model also qualitatively predicts the much shorter retardation behaviour of styrene and MMA which is due to the lower values of the product of the propagation rate coefficient and the water solubility for these monomers.
Keyword Vinyl acetate
Free-radical emulsion polymerisation
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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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
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Created: Mon, 07 Mar 2011, 15:40:52 EST