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Activation Volume of Secondary Relaxation
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Materials Sciences and Applications·Volume 02 (2011)·Pages 624–628·Published 24 June 2011·DOI10.4236/msa.2011.26084
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Abstract
Glass forming materials are characterized by a complex relaxation pattern, which evolves over several time decades. Dielectric spectroscopy has proven particularly useful for studying such scenario as it is able to monitor the dielectric dynamics of a system over a range up to 16 time decades. In this work we study effect of thermodynamic history on activation volume of secondary relaxation inside the glassy forming systems, Poly[(phenyl glycidyl ether)-co-formaldehyde], (PPGE) and 1,18-bis (p methoxyphenyl) cyclohexane (BMPC), with two different type of secondary relaxation. Our results show that at bout systems, activation volume of secondary depends to the thermodynamic history.
KeywordsActivation VolumeSecondary RelaxationGlassy StatePressure Effects
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