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Influence of post-cure on carbon fibre polyimide composites with glass transition temperatures above 400c
RISE, Swerea, SICOMP. Luleå University of Technology, Sweden.
RISE, Swerea, SICOMP. Luleå University of Technology, Sweden.ORCID iD: 0000-0002-5210-4341
RISE - Research Institutes of Sweden, Materials and Production, SICOMP.ORCID iD: 0000-0002-1594-2688
RISE, Swerea, SICOMP.
2015 (English)In: ICCM International Conferences on Composite Materials, International Committee on Composite Materials , 2015Conference paper, Published paper (Refereed)
Abstract [en]

The current communication present results from work on polymeric composites with extreme temperature performance. This study focuses on carbon fibre composites based on a new phenyl ethynyl terminated polyimide formulation NEXIMID® MHT-R (Nexam Chemicals AB, Sweden) based on hexafluoroisopropylidene bisphthalic dianhydride (6-FDA), 4-(Phenylethynyl)Phthalic Anhydride (4-PEPA) and ethynyl bis-phthalic anhydride (EBPA). In particular influence of post-cure conditions such as time, temperature and atmosphere on Tg of the composites is investigated. In addition to this monitoring and analyses of the consequences of post-cure on mass loss and occurrence of micro-cracks is carried out. Three different post-curing temperatures are considered in this study: 400°C, 420°C and 440°C. Two different atmospheres, air and inert by nitrogen, were also investigated. In summary the results reveal that remarkably high Tg, up to around 460°C, is achieved with only very limited mass loss. It was also observed that some, but limited amounts of, micro-cracks are developed within the laminates due to the inevitable high thermal stresses generated upon cooling from cure temperature.

Place, publisher, year, edition, pages
International Committee on Composite Materials , 2015.
Keywords [en]
Cure induced cracking, Curing, Glass transition temperature, Mass loss, Polyimide
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-42199Scopus ID: 2-s2.0-85040079124OAI: oai:DiVA.org:ri-42199DiVA, id: diva2:1379830
Conference
20th International Conference on Composite Materials, ICCM 2015, 19 July 2015 through 24 July 2015
Available from: 2019-12-17 Created: 2019-12-17 Last updated: 2020-01-28Bibliographically approved

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