Abstract
AbstractThe relaxation processes in atactic poly(benzyl methacrylate) were studied by means of dielectric measurements. Beside the α‐ and β‐relaxation processes due to the segmental motions of the main chain and of the entire side chain, respectively, a process designated as γ was found to occur in the temperature range between −60°C and 0°C. For the γ‐relaxation, the time‐temperature superposition principle is applicable. A linear relationship between temperature and the relaxation frequency fm or shift factor aT was found. Apparent activation energies estimated from the temperature dependence of fm and aT are 50 and 53 kJ · mol−1, respectively. The γ‐process is considered to result from the movement of the benzyl group in the side chain.
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