Raman-microscopy has been used to analyse a series of high modulus polyethy
lene fibres. The high degree of orientation within the material means that
upon 90 degrees rotation of the samples and/or polarisation analyser, marke
d variations in band intensities occur throughout the spectra. Measurements
of the 1131:1064 cm(-1) band intensity ratio of the fibres are made and re
lated to their Young's modulus. This relationship is useful in morphologica
l studies of polyethylene fibres. (C) 1998 Kluwer Academic Publishers.