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Substituent effects in ethene/styrene copolymerization : dormant state destabilization?
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Theaker, Giles W., Morton, Colin and Scott, Peter, 1965 Dec. 10-. (2009) Substituent effects in ethene/styrene copolymerization : dormant state destabilization? Journal of Polymer Science Part A- Polymer Chemistry, Vol.47 (No.12). pp. 3111-3117. ISSN 0887-624X
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Official URL: http://dx.doi.org/10.1002/pola.23417
Abstract
Homogeneous metallocene and CGC catalyzed copolymerizations of ethene (E) and various substituted styrenes are examined. It is found that those with p-tert-butylstyrene (TBS) occur with dramatically higher degrees of incorporation and overall productivity than those observed under the same conditions with styrene. It is argued that that the sigma-donating effect of the tert-butyl substituent is responsible for this performance, effecting a destabilization of an otherwise dormant benzylic species following 2,1-insertion of the styrene. It was found possible to produce what is essentially TBS-alt-E (44% TBS with no sequential TBS units) using a standard constrained geometry catalyst at impressively high productivity 1.1.5 x 10(6) g/(mol(Ti).bar(E).h)] and unusually low concentration of TBS (0.7 M). (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 31,11-3117, 2009
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QD Chemistry T Technology > TP Chemical technology |
| Divisions: | Faculty of Science > Chemistry |
| Library of Congress Subject Headings (LCSH): | Polymerization, Copolymers, Polyethylene, Styrene, Metal catalysts |
| Journal or Publication Title: | Journal of Polymer Science Part A- Polymer Chemistry |
| Publisher: | John Wiley & Sons Ltd. |
| ISSN: | 0887-624X |
| Date: | 15 June 2009 |
| Volume: | Vol.47 |
| Number: | No.12 |
| Number of Pages: | 7 |
| Page Range: | pp. 3111-3117 |
| Identification Number: | 10.1002/pola.23417 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| Funder: | Engineering and Physical Sciences Research Council (EPSRC) |
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| URI: | http://wrap.warwick.ac.uk/id/eprint/27789 |
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