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unfortunately it is usual now to give Tg values from DMTA measurements. But it is not correct; with DMTA, maximum of alpha relaxation, Talpha is measured and this value is related to Tg. Authors have to remind that Tg measured by DSC only depends on the heating (or cooling) rate. Talpha depends both on the heating rate and the frequency. In the text and in the Table corrections have to be made.

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