A thermomechanical technique for characterizing pitch

Jinan Cao; S. Chatfield; J. Saxby

doi:10.1007/bf02636119

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Journal of Thermal Analysis and Calorimetry

Volume/Issue:: Volume 44: Issue 2

A thermomechanical technique for characterizing pitch

Authors: Jinan Cao¹, S. Chatfield¹, and J. Saxby¹

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¹ CSIRO Division of Coal and Energy Technology PO Box 136 2113 North Ryde NSW Australia
² CSIRO Division of Wool Technology Geelong Laboratory PO Box 21 3216 Belmont Victoria Australia

DOI:: https://doi.org/10.1007/bf02636119

Page Count:: 281–291

Publication Date:: 01 Feb 1995

Online Publication Date:: 06 Jul 2007

Article Category:: Research Article

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Abstract

Thermomechanical analysis (TMA) in a tube-compressive mode can be used to characterize pitch in a reproducible and sensitive way. In a single experiment, this technique enables simultaneous determination of the glass transition temperature, the softening temperature and the rheological behaviour of a pitch sample. Results on a typical Australian coal-tar pitch are consistent with Bingham fluid behaviour above its softening temperature with a yield stress of the order of 100 Pa. In a similar test a petroleum pitch sample exhibited no yield stress.