Paramagnetism in Fibre-Forming Poly(Phenylenebenzimidazole Terephthalamides)

The change in the content of paramagnetic centers in poly(phenylenebenzimidazole terephthalamide) fibres was studied as a function of the heat treatment temperature. It is shown that the PMC content increases slightly in the heat-treated fibres in the 100-200°C temperature region, and the PMC conten...

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Published inFibre chemistry Vol. 35; no. 4; pp. 287 - 289
Main Authors Dovbii, E. V., Zhuravleva, A. I., Sidorov, O. V., Frenkel', G. G., Shchetinin, A. M.
Format Journal Article
LanguageEnglish
Published New York Springer Nature B.V 01.07.2003
Subjects
Fibers
Fibre
Fibres
Heat treatment
Hydrogen bonds
Paramagnetism
Thermal degradation
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Summary:The change in the content of paramagnetic centers in poly(phenylenebenzimidazole terephthalamide) fibres was studied as a function of the heat treatment temperature. It is shown that the PMC content increases slightly in the heat-treated fibres in the 100-200°C temperature region, and the PMC content then decreases at 200-350°C. At temperatures above 360°C, the number of PMC in the heated fibres increases. It is hypothesized that the change in the content of PMC under 350°C is due to the character of the hydrogen bonds in the system. Above 360°C, thermal degradation of the polymer is the basic cause of the increase in the PMC content in the heated fibres.[PUBLICATION ABSTRACT]
Bibliography:ObjectType-Article-2
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ISSN:0015-0541
1573-8493
DOI:10.1023/B:FICH.0000003481.51701.68