Kevlar 49 fibres: Thermal expansion coefficients from high temperature X-ray data

摘要

Axial and basal plane coefficients of thermal expansion (alpha) have been estimated for Kevlar 49 fibres using high temperature X-ray diffraction data. The monoclinic unit cell exhibits an anisotropic behaviour. Whereas the axial dimension contracts with heating, the basal plane expands. The unit cell, however, registers an overall increase in volume. [References: 21]