Abstract

the molec­ular motion in polymers is restricted to specific groups or structural rearrangements responsible for secondary relax­ations. Numerous studies of subglass processes have been reported by utilizing mainly dynamic mechanical (MS) and dielectric (DS) spectroscopic techniques. There is a consensus about the Arrhenius temperature dependence of the characteristic relaxation rates, the inherent broad dis­tribution, as well as the short correlation length of the underlying thermal fluctuations. Therefore, the observed agreement between MS, DS, and light scattering results for one polymeric glass system

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