A low frequency dielectric study of glass-forming maltitol and sorbitol has been performed. It enables us to show an effect of a side branching on the sub- T g relaxation curves. This molecular complexity has no effect on the temperature evolution of the secondary relaxation times of both compounds, which superimpose perfectly. However, side branching leads in maltitol to a sharpening of the corresponding distribution and occurrence of an intermediate strongly activated process, which has no separate secondary counterpart.
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Carpentier et al. (2002) studied this question.
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