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Deformation behavior of Kevlar fibers studied by Raman spectroscopy
Author(s) -
Prasad Keshav,
Grubb David T.
Publication year - 1990
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1990.070410923
Subject(s) - kevlar , raman spectroscopy , materials science , paracrystalline , composite material , deformation (meteorology) , stress (linguistics) , optics , crystallography , chemistry , composite number , linguistics , physics , philosophy
The tensile deformation of Kevlar fibers has been studied using Raman spectroscopy. The Raman bands shifted to lower wavenumbers and broadened with stress. The shift of the 1610 cm −1 Raman band per unit stress was about −2.5 cm −1 /GPa in both Kevlar 29 and Kevlar 49. A simple one phase paracrystalline model is used to explain the observed shifts. The total increase in the width of the 1610 cm −1 Raman band was about 2.5 cm −1 and the increase in width was negligible till a stress of about 0.5 GPa.