Analysis of the mechanism of copolymerization of styrene and maleic anhydride

Hill D.J.T., O'Donnell J.H. and O'Sullivan P.W. (1985) Analysis of the mechanism of copolymerization of styrene and maleic anhydride. Macromolecules, 18 1: 9-17.

Author Hill D.J.T.
O'Donnell J.H.
O'Sullivan P.W.
Title Analysis of the mechanism of copolymerization of styrene and maleic anhydride
Journal name Macromolecules   Check publisher's open access policy
ISSN 0024-9297
Publication date 1985-01-01
Sub-type Article (original research)
Volume 18
Issue 1
Start page 9
End page 17
Total pages 9
Subject 2505 Materials Chemistry
Abstract The mechanism of copolymerization of styrene and maleic anhydride in bulk at 60 °C has been investigated by measurements of copolymer compositions using 13C NMR and of monomer sequence distributions using DEPT pulse programs to distinguish CH2 subspectra, which have been attributed to styrene-centered triads. The strong tendency to alternation observed by most previous workers was confirmed. Nonlinear, least-squares analysis of the compositions of copolymers prepared over a wide comonomer composition range showed that the penultimate model gave a better fit to the data than the terminal model with a confidence level >95%. There was only a penultimate effect for styrene-terminated chain radicals. A similar analysis of the composition data of Bamford and Barb for comonomer mixtures with high styrene contents gave reactivity ratios in good agreement with the values derived from our composition data. The complex-participation and complex-dissociation models could also be fitted to the composition data but there was a strong correlation between different reactivity ratios, indicating extensive minima on the hypersurface. The monomer sequence distributions were in good agreement with the predictions of both the penultimate and complex-participation models and could not distinguish between them.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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