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Micro‐Raman and IR study of the compressive behaviour of poly(paraphenylene benzobisoxazole) (PBO) fibres in a diamond‐anvil cell
Author(s) -
Colomban Philippe,
AidiMounsi Achraf,
Limage MarieHélène
Publication year - 2007
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1631
Subject(s) - raman spectroscopy , materials science , diamond , diamond anvil cell , polyamide , composite material , nanomechanics , polymer chemistry , nanotechnology , high pressure , optics , thermodynamics , atomic force microscopy , physics
The micro/nano structural evolution of PBO (poly(paraphenylenebenzobisoxazole), commercial name Zylon) fibres has been studied by Raman and IR spectroscopy in a diamond‐anvil cell, up to ∼15 GPa. Different modes were considered in the 900–1700 cm −1 (Raman) and 800–3300 cm −1 (IR) spectral range. The material behaviour appears more similar to that of a densely packed inorganic structure than to the behaviour previously observed for polyamide fibres, and is related to the compact arrangement of the rigid heterocyclic rings. Wavenumber shift starts with increase in pressure and a transition between the two regimes was revealed at ∼2–2.5 GPa, and it was assigned to the loss of order between neighbouring PBO chains. A good correlation is observed between the macroscopic mechanical properties and the nanomechanics at the chemical bond scale. Copyright © 2006 John Wiley & Sons, Ltd.