Rapid evaluation of long-term thermal degradation of carbon fibre epoxy composites |
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| Authors: | J. Wolfrum S. Eibl L. Lietch |
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| Affiliation: | 1. Department of Materials Engineering and Convergence Technology, Research Institute for Green Energy Convergence Technology, Center for Creative Human Resource & Convergence Materials, Gyeongsang National University, Jinju 660-701, Republic of Korea;2. Department of Mechanical Engineering, The University of Utah, Salt Lake City, UT 84112, USA;1. AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Krakow, Poland;2. Delphi Technical Center Krakow, ul. Podgorki Tynieckie 2, 30-399 Krakow, Poland;1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;2. Department of Civil Engineering, Monash University, Clayton, VIC 3800, Australia;1. School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150001, PR China |
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| Abstract: | Two commercially available carbon fibre reinforced composites (8552/IM7 and M18-1/G939) were exposed to heat above maximum operational temperature at various durations. Mass loss and mechanical properties were measured over time. A chemical analysis was also performed on these composites. The two primary components of each matrix, the epoxy resin and the thermoplastic, were observed to degrade at different rates under various thermal loading conditions. The epoxy resins degrade predominantly as measured by IR spectroscopy and thermal desorption/gas chromatography mass spectrometry. By using mass loss, strength, and IR spectroscopic data, a correlation was made between strength characteristics of each composite and the relative amount of the two primary matrix components. The developed relationship can be used to estimate rapidly the mechanical properties from the intensity ratio of IR bands characteristic of the two components. |
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