Abstract
The enthalpy relaxation of glassy d-sorbitol was analyzed in terms of the Tool–Narayanaswamy–Moynihan model using differential scanning calorimetry. Both the classic and annealing cycles were carried out to obtain the experimental heat capacity data. Both the single- and multi-curve fittings were performed to get the model parameters. A series of initial values of apparent activation energy were tested, with the aim to minimize the average square deviations in fittings. The parameter sets found by single-curve fitting differ from each other, so they should not be taken as the model constants. The multi-curve fitting seems to be more reliable for the model parameters extraction.
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