Catalytic Chain-Transfer in Polymerization of Methyl Methacrylate. I. Chain-Length Dependence of Chain-Transfer Coefficient
- 1 August 1989
- journal article
- research article
- Published by Taylor & Francis in Journal of Macromolecular Science: Part A - Chemistry
- Vol. 26 (8) , 1137-1149
- https://doi.org/10.1080/00222338908052039
Abstract
Free-radical polymerization of methyl methacrylate has been conducted in the presence of a new catalytic chain-transfer agent at different temperatures. The new catalyst exhibits a strong chain transfer characteristic, and the chain-transfer coefficient varies from 2.8 × 104 to 6.6 × 104 and depends on chain length and temperature. The chain-transfer coefficients decrease with increasing chain length but reach a limiting value for chains more than 8 units in length. The activation energy for the chain transfer coefficient is -10.1 kJ/mol for this catalyst.Keywords
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