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When we keep an amorphous polymer at a temperature below its glass transition temperature Tg or when we vary the cooling rate of the polymer from its melting temperature to a temperature below Tg, it is not in a true thermodynamical equilibrium state and many of its properties change such as the free volume, the enthalpy and other properties. This behavior is called Physical ageing. In this paper,...
Polycrystalline powder samples of L-asparagine monohydrate a fundamental amino acid has been studied for thermal relaxation using Thermally Stimulated Depolarizing Current (TSDC) in its normal and thermal window variations. Blank zero field TSDC, differential scanning calorimetry and x-ray diffraction studies have been performed to explore the effect of heating and cooling cycle on the sample. From...
Hydrogels play a key role in many pharmaceutical and bio-applications. It is therefore advantageous to be able to predict the gelation process so that properties and performance of hydrogels can be optimized for these applications. This study examines the numerical models proposed earlier and modifies them in order to describe more accurately and appropriately the thermally induced gelation and degelation...
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