Low temperature crystallographic data on Kevlar 49 fibres

Iyer, R. V. ; Sooryanarayana, K. ; Guru Row, T. N. ; Vijayan, K. (2003) Low temperature crystallographic data on Kevlar 49 fibres Journal of Materials Science, 38 (1). pp. 133-139. ISSN 0022-2461

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Official URL: http://www.springerlink.com/index/J3G87KQ16H6RR743...

Related URL: http://dx.doi.org/10.1023/A:1021178219377


Using X-ray diffraction data, the behaviour of Kevlar 49 fibres at low temperatures, up to -100°C, has been analysed. During cooling, the basal plane of the monoclinic unit cell shrinks whereas the c- (unique, chain axis) length is not significantly affected. In contrast, in the return heating cycle to ambient temperature, the basal plane expands and contraction occurs along the chain direction. The unit cell registers a reduction in volume in both the cooling and heating cycles. Conspicuously, after a cycle of cooling and heating, the unit cell does not return to its initial volume.

Item Type:Article
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ID Code:12004
Deposited On:10 Nov 2010 05:08
Last Modified:16 May 2016 21:24

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