Investigations on the problem of moisture absorption by KEVLAR fibres - Effect of relative humidity of the atmosphere and the degree of crystallinity of the fibres

Parimala, HV and Shubha, M and Vijayan, Kalyani (1990) Investigations on the problem of moisture absorption by KEVLAR fibres - Effect of relative humidity of the atmosphere and the degree of crystallinity of the fibres. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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Abstract

The effect of (1) relative humidity, (RH), of the ambient atmosphere and (2) the degree of crystallinity of fibres, on the process of moisture uptake by Kevlar 49 fibres have been investigated. For RH values ranging from 3 to 80%, variation of the moisture content of the initially dry fibres with time, has been measured. It is found that the saturation moisture content varies with the RH value. Specimens in which crystallinity has been reduced by appropriate treatment, exhibit a marked increase in the moisture content. Experiments on the effect of soaking the fibres in water at 26xB0; and 98xB0;C, have also been carried out.

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: Kevlar;Moisture absorption;Relative humidity;Crystallinity13;
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Poornima Narayana
Date Deposited: 07 Aug 2006
Last Modified: 24 May 2010 04:17
URI: http://nal-ir.nal.res.in/id/eprint/2312

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