Compressive Behaviour of PBZ Fibres in Composites
Abstract
This final report reviews progress over the two years of the project concerning the compressive behaviour of three types of PBZ fibres. The materials investigated were as-spun and heat-treated fibres of PBT, PBO and ABPBO. Their structure has been determined using X-ray diffraction, optical microscopy sna scanning electron microscopy. The tensile properties of the fibres have been determined using tensile tests in individual filaments and their compressive deformation behaviour has been examined initially by bending individual fibres. The formation of kinkbands has been followed in detail by the compression of epoxy resin blocks containing single fibres aligned in the compression direction. Molecular deformation in the fibres has been followed using Raman microscopy. It has been found that the bands in the Raman spectra shift to lower frequency on the application of a tensile stress or strain. The onset of kinkband formation has been monitored at the molecular level by obtaining Raman spectra from the single filaments within epoxy resin blocks subjected to axial compression. Keywords: Composites, Rigid rods, High modulus fibres, Compressive behaviour, PBZ fibres, Poly(p-phenylene benzobisthiazole), Poly(p-phenylene benzobisoxazole), Poly(2,5(6)-benzoxazole).
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1990
- Accession Number
- ADA223173
Entities
People
- P. P. Ang
- R. J. Young
Organizations
- University of Manchester