M. Kamachi, Y. Kuwae, S. Nozakura
Oct 1, 1981
Citations
0
Influential Citations
33
Citations
Journal
Polymer Journal
Abstract
An ESR study on the radical polymerization of triphenylmethyl methacrylate was carried out in 2-methyltetrahydrofuran over a temperature range from −90°C to 30°C. A well-resolved 9-line spectrum was observed at−90°C, a 5-line spectrum at −50°C, and a 13-line spectrum at 0°C. When the observation temperature was raised from 0°C to 30°C, a 5-line spectrum was recorded again. This change in the spectrum with temperature was explained on the basis of two stable conformations and the interchange between them through the free rotation of the radical end. The existence of these two conformations was supported by the calculation of conformation energy.