Journal
JOURNAL OF COMPOSITE MATERIALS
Volume 52, Issue 2, Pages 261-274Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0021998317705706
Keywords
Polymer-matrix composites; high-temperature properties; mechanical testing; resin transfer moulding
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Funding
- Clean Sky-project [325939]
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In this study, the mechanical performance assessment of a newly developed carbon fibre-reinforced polyimide composite system T650/NEXIMID (R) MHT-R is presented. This system was subjected to a series of mechanical tests at ambient and elevated temperature (320?) to determine basic material properties. Moreover, an additional test was conducted, using a T650/NEXIMID (R) MHT-R laminate in which the fibre sizing was thermally removed prior to laminate manufacturing, to investigate the effect of fibre treatment on mechanical performance. The experimental results indicated that the T650/NEXIMID (R) MHT-R composites along with exceptionally high T-g (360-420?) exhibited competitive mechanical properties to other commercially available polyimide and epoxy-based systems. At elevated temperature, the fibre-dominated properties were not affected whilst the properties defined by matrix and fibre/matrix interface were degraded by approximately 20-30%. Finally, the fibre sizing removal did not affect the tensile and compressive strength, however, the shear strength obtained from short-beam shear test was deteriorated by approximately 15%.
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