Decomposition behaviour of Kevlar 49 fibres: Part I. AtT≈T d | Zendy

R. V. Iyer | Zendy; Kalyani Vijayan | Zendy

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Decomposition behaviour of Kevlar 49 fibres: Part I. AtT≈T d

Author(s) -

R. V. Iyer,

Kalyani Vijayan

Publication year - 1999

Publication title -

bulletin of materials science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.35

H-Index - 72

eISSN - 0973-7669

pISSN - 0250-4707

DOI - 10.1007/bf02745614

Subject(s) - materials science , crystallinity , kevlar , decomposition , composite material , thermal decomposition , isothermal process , ultimate tensile strength , synthetic fiber , pyrolysis , composite number , chemical engineering , fiber , thermodynamics , organic chemistry , chemistry , physics , engineering

The structural changes which accompany decomposition of Kevlar 49 fibres atT=500°C and 550°C, respectively, have been elucidated. At both these temperatures, cumulative thermal exposures of specific durations,t cum(T), are required to result in decomposition. The conspicuous features which characterize isothermal decomposition of the fibres are: (i) progressive reduction and an eventual total loss in fibre crystallinity, (ii) progressive loss in weight, (iii) introduction of surface damages, (iv) introduction of hollowness, and (v) deterioration in tensile properties.

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