Seeded heterogeneous polymerization of acrylonitrile

McCarthy, S.J., Elbing, E.E., Wilson, I.R., Gilbert, R.G., Napper, D.H. and Sangster, D.F. (1986) Seeded heterogeneous polymerization of acrylonitrile. Macromolecules, 19 9: 2440-2448. doi:10.1021/ma00163a019


Author McCarthy, S.J.
Elbing, E.E.
Wilson, I.R.
Gilbert, R.G.
Napper, D.H.
Sangster, D.F.
Title Seeded heterogeneous polymerization of acrylonitrile
Journal name Macromolecules   Check publisher's open access policy
ISSN 0024-9297
1520-5835
Publication date 1986-09
Sub-type Article (original research)
DOI 10.1021/ma00163a019
Volume 19
Issue 9
Start page 2440
End page 2448
Total pages 9
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Formatted abstract
Results are reported of an extensive study at 50°C of the kinetics of seeded heterogeneous polymerization of acrylonitrile (a monomer which is water soluble but insoluble in its polymer). K2S2O8 or γ-irradiation initiation were used, runs using the latter also yielding relaxation kinetics after removal from the radiation source; since free radical loss processes are likely to be similar in all three types of system, these studies permit more inferences to be made than are possible with, e.g., chemical initiation alone. It is thus shown that (i) data can be interpreted by a general kinetic scheme developed for compartmentalized po-lymerization, (ii) the locus of polymerization is the particle surface, (iii) the average number of free radicals per particle is high (≃250), (iv) radical capture efficiency by the particles is 100%, and (v) for the free radical fluxes used here, all loss of free radical activity is pseudo first order, consistent with the rate-determining step occurring in association with the particle and being the inhibition of propagation due to environmental constraints (e.g., when the propagating free radical grows in such a way as to become completely surrounded with glassy polymer).
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, 15:52:45 EST