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High pressure DTA analysis of multiple melting behavior of poly(alkylene succinate)s

Rohindra, David and Kuboyama, Keiichi and Ougizawa, Toshiaki (2009) High pressure DTA analysis of multiple melting behavior of poly(alkylene succinate)s. [Conference Proceedings]

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Abstract

Thermodynamic parameters such as heats of fusion of perfect crystal of a semicrystalline polymer can be estimated from the Clausius-Clapeyron equation using the pressure dependence of melting temperature dTm/dp. However, polymers that exhibit multiple melting peaks in the heating scan, the dTm/dp of each peak shows different values. Therefore, the origin of each melting peak must be clarified. Poly(ethylene succinate) (PESu) and poly(butylene succinate) (PBSu) show multiple melting peak in isothermally crystallized samples and melting, recrystallization has been proposed to explain the melting behavior. In this study the multiple melting peaks in isothermally crystallized PESu and PBSu samples was investigated using high pressure DTA by suppressing the recrystallization process through increased pressure rather than increased heating rate.

Item Type: Conference Proceedings
Subjects: Q Science > QD Chemistry
Divisions: Information Technology Services (ITS)
Depositing User: Fulori Nainoca
Date Deposited: 24 May 2017 12:56
Last Modified: 24 May 2017 12:56
URI: http://repository.usp.ac.fj/id/eprint/9921
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