Tacticity of poly(methyl methacrylate): evidence for a penpenultimate group effect in free-radical polymerization

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41104

Title: Tacticity of poly(methyl methacrylate): evidence for a penpenultimate group effect in free-radical polymerization
Author(s): Moad, Graeme; Solomon, David H.; Spurling, Thomas H.; Johns, Stanley R.; Willing, Richard Ian
Abstract: The tacticity of poly(methyl methacrylate) prepared by free-radical polymerization has been determined by analysing the carbonyl region of the 13C n.m.r . spectrum. This analysis demonstrates that the addition of poly(methyl methacrylyl) radical to methyl methacrylate in benzene at 60°C is subject to a significant penpenultimate unit effect. The probability of forming a meso dyad is some 20% less if the preceding dyad in the chain is also meso. The polymerization (60°C, benzene) is described by the following parameters P(m) = 0.202, P(m|m) = 0.159, P(r | m) = 0.212.
Publication type: Journal article
Source: Australian Journal of Chemistry, Vol. 39, no. 1 (1986), pp. 43-50
Publication year: 1986
Keyword(s): Benzene; Polymerisation
Publisher: CSIRO
ISSN: 0004-9425
Publisher URL: http://dx.doi.org/10.1071/CH9860043
Peer reviewed