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Evolved Gas Analysis of Rigid-Rod Polymers

Published online by Cambridge University Press:  26 February 2011

E. Grant Jones  and
Donald L. Pedrick
E. Grant Jones
Affiliation:
Systems Research Laboratories, Inc., A Division of Arvin/Calspan, 2800 Indian Ripple Road, Dayton, OH 45440–3696
Donald L. Pedrick
Affiliation:
Systems Research Laboratories, Inc., A Division of Arvin/Calspan, 2800 Indian Ripple Road, Dayton, OH 45440–3696
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Abstract

The rigid-rod polymer system poly(phenylenebenzobisthiazole), designated as PBZT, has considerable potential in materials engineering. The vacuum thermal behavior of this system and various substituted analogues, including methyl-, phenyl-, and benzothiazolyl-substituted members, has been studied using the combined techniques of thermogravimetry and mass spectroscopy (TG-MS).

Primary volatile products identified from the PBZT series include H2S, HCN, CS2, NH3, C6H5CN, C6H4(CN)2, and HSCN. The presence of pendant groups such as methyl, phenyl, or benzothiazolyl results in the evolution of methane, benzene, or benzothiazole in low-temperature degradation processes. The relative abundance and temporal sequence of these gases which are evolved during slow heating in vacuum provide valuable information concerning thermal stability.

The implications of the identification and study of evolved gases toward the understanding of the mechanisms of heat treating of rigid-rod polymer systems will be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 134: Symposium J – Materials Science and Engineering of Rigid-Rod Polymers , 1988 , 407
Copyright
Copyright © Materials Research Society 1989

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References

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