Thermal characteristics of high-strength and thermostable aromatic fibres

• Published in: Fibre chemistry Vol. 40; no. 3; pp. 266 - 269
• Main Authors: Perepelkin, K. E, Dresvyanina, E. N, Pakshver, E. A
• Format: Journal Article
• Language: English
• Published: Boston Boston : Springer US 01.05.2008; Springer US; Springer Nature B.V
• Subjects: Chemistry; Chemistry and Materials Science; Correlation; Differential scanning calorimetry; Dynamic tests; Fibers; Fibres; Organic Chemistry; Polyimide resins; Polymer Sciences; Polymers; Stability; Thermal stability; Thermogravimetric analysis; Polyimide; Hydrogen Index; Differential Scanning Calorimetry Study; Differential Scanning Calorimetry Curve; Differential Scanning Calorimetry
• ISSN: 0015-0541; 1573-8493
• DOI: 10.1007/s10692-008-9050-5

The thermal characteristics of para-aramid, polyoxadiazole, and polyimide fibres were comparatively investigated by dynamic thermogravimetric analysis, differential scanning calorimetry, and thermomechanical analysis. It was shown that thermooxidative degradation of these types of fibres began at 400-450 °C and intensified at higher temperatures. The fibres investigated are characterized by size stability up to the initial temperature of thermooxidative processes (400-450 °C). With respect to thermal stability, these fibres are in the following order: polyimide > polyoxadiazole, and carbocyclic para-aramid fibres. The correlation of the “hydrogen index” IH and “aromaticity index” IAr for thermostable fibres with their thermal stability was demonstrated.