2009•Chemistry Journal of MoldovaOpen access

Implications of Global and Local Mobility in Amorphous Excipients as Determined by DSC and TM DSC

Ion Dranca, Tudor Lupaşcu

Abstract

The paper explores the use of differential scanning calorimetry (DSC) and temperature modulated differential scanning calorimetry (TM DSC) to study α- and β- processes in amorphous sucrose and trehalose. The real part of the complex heat capacity is evaluated at the frequencies, f, from 5 to 20mHz. β-relaxations were studied by annealing glassy samples at different temperatures and subsequently heating at different rates in a differential scanning calorimeter.

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Key concepts: Differential scanning calorimetry, Amorphous solid, Chemistry, Annealing (glass), Heat capacity, Glass transition, Calorimetry, Analytical Chemistry (journal)