Thermal properties of fibres from a new polymer of the polyimideamide group |
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Authors: | Janowska G. MikoŁajczyk T. |
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Affiliation: | (1) Institute of Polymers, Technical University of Łódź, 90-924 Łódź, Poland;(2) Department of Man-Made Fibres, Technical University of Łódź, Łódź, Poland |
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Abstract: | The paper presents the thermal properties of fibres made of a modified polyimideamide. The effects of as-spun draw ratio and deformation during the fibre drawing stage on the structure, thermal properties, moisture absorption and tenacity of the obtained fibres have been determined. Based on the findings obtained by the DTA and DSC methods, it has been found that the modification of the polymer under investigation causes its glass transition temperature to decrease through the increase of molecular mobility. At the same time, the heat-resistant fibres with the amorphous oriented structure are characterized by a tenacity of 16 cN/tex, good absorption properties and increased porosity. The thermal stability indices of the examined fibres have been determined on the basis of thermogravimetric curves obtained both under air and inert gas. This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | absorption properties DTA thermal stability indices DSC thermal properties thermal stability modified polyimideamide fibres strength properties TG glass transition temperature |
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