Application of raman microscopy to the analysis of high modulus polymer fibres and composites
作者:
Robert J. Young,
Richard J. Day,
期刊:
British Polymer Journal
(WILEY Available online 1989)
卷期:
Volume 21,
issue 1
页码: 17-21
ISSN:0007-1641
年代: 1989
DOI:10.1002/pi.4980210104
出版商: John Wiley&Sons, Ltd
关键词: composites;Raman spectroscopy;carbon fibres;PEEK;shrinkage stress
数据来源: WILEY
摘要:
AbstractRaman microscopy has been used to study the deformation of carbon fibres and an experimental grade carbon‐fibre/PEEK composite prepreg. It has been found that the peak position of the Raman‐active bands in the fibres are sensitive to the level of applied strain. Examination of the peak positions from the carbon fibres near the surface of the prepreg shows that the fibres are subjected to a residual compressive strain. The application of a tensile stress to the composite causes the fibre strain to become tensile although significant scatter is found in the measurements. The scatter is thought to be due to variations in the local carbon‐fibre strain at the 1 μm level. It is demonstrated that residual compressive strain is expected from differential shrinkage between the fibres and matrix on cooling the composite from the processing temperature to room tempe
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