Thermal decomposition of poly( p-phenylene benzobisoxazole) fibres: monitoring the chemical and nanostructural changes by Raman spectroscopy and scanning probe microscopy

Thermal decomposition of poly( p-phenylene benzobisoxazole) (PBO) in two different commercial varieties (as-spun and high-modulus) has been studied between room temperature and 1123 K. Thermogravimetry and differential thermal analysis allowed the main stages of the pyrolytic degradation of the mate...

Full description

Saved in:
Bibliographic Details
Published in:Polymer degradation and stability 2004-11, Vol.86 (2), p.263-268
Main Authors: Tamargo-Martı́nez, K., Villar-Rodil, S., Paredes, J.I., Montes-Morán, M.A., Martı́nez-Alonso, A., Tascón, J.M.D.
Format: Article
Language:English
Subjects:
AFM
Applied sciences
DTA
Exact sciences and technology
PBO fibres
Physicochemistry of polymers
Polymer industry, paints, wood
Pyrolysis
Technology of polymers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Thermal decomposition of poly( p-phenylene benzobisoxazole) (PBO) in two different commercial varieties (as-spun and high-modulus) has been studied between room temperature and 1123 K. Thermogravimetry and differential thermal analysis allowed the main stages of the pyrolytic degradation of the material to be established. On the basis of these results, samples were treated at several controlled temperatures and characterized by elemental analysis, X-ray diffraction (XRD), Raman spectroscopy and atomic force microscopy (AFM). X-ray diffraction measurements indicated that, at heat treatment temperatures below 933 K, the polymer retains its original conformation and even becomes stabilized by an enhancement of its crystallinity. The decomposition takes place in a single step and the main changes occur within a very narrow temperature interval (973–993 K), as shown by Raman spectroscopy and XRD. The final carbon fibre residue is rich in nitrogen and, as AFM showed, it retains a certain degree of anisotropy. The two studied varieties of PBO differed only in their behaviour before the beginning of thermal degradation.
ISSN:0141-3910
1873-2321
DOI:10.1016/j.polymdegradstab.2004.05.004