The Effects of Ester Chain Length and Temperature on the Catalytic Chain Transfer Polymerization of Methacrylates

The catalytic chain transfer polymerizations of methyl, ethyl, and butyl methacrylates were studied over the temperature range 40−70 °C with cobaloxime boron fluoride (COBF) and its tetraphenyl derivative (COPhBF). It was found that for both catalytic chain transfer agents the chain transfer constan...

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Bibliographic Details
Published in:	Macromolecules Vol. 32; no. 12; pp. 3907 - 3912
Main Authors:	Heuts, Johan P. A, Forster, Darren J, Davis, Thomas P
Format:	Journal Article
Language:	English
Published:	Washington, DC American Chemical Society 15-06-1999
Subjects:	Applied sciences Exact sciences and technology Organic polymers Physicochemistry of polymers Polymerization Preparation, kinetics, thermodynamics, mechanism and catalysts Substituent effect Free radical polymerization Catalytic reaction Chain transfer Bulk polymerization Alkyl methacrylate polymer Reaction mechanism Kinetics Cobalt complex Experimental study Activation energy
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Summary:	The catalytic chain transfer polymerizations of methyl, ethyl, and butyl methacrylates were studied over the temperature range 40−70 °C with cobaloxime boron fluoride (COBF) and its tetraphenyl derivative (COPhBF). It was found that for both catalytic chain transfer agents the chain transfer constant decreases in going from methyl to butyl methacrylate, and that there is no significant temperature effect on the observed chain transfer constants. The results are consistent with a diffusion-controlled rate coefficient for the chain transfer reaction.
Bibliography:	ark:/67375/TPS-V2SNLSPL-D istex:F0982415C4D31258EB98AE6B3CEBF4EFE3FC203D ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0024-9297 1520-5835
DOI:	10.1021/ma9901341