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Influence of post-cure on carbon fibre polyimide composites with glass transition temperatures above 400ºC
Luleå tekniska universitet, Swerea SICOMP AB, Swerea SICOMP AB, Box 271, 941 26, Piteå.ORCID-id: 0000-0002-5948-7525
Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, Materialvetenskap.ORCID-id: 0000-0002-5210-4341
Swerea SICOMP AB.
Swerea SICOMP AB.
2015 (engelsk)Konferansepaper, Oral presentation only (Fagfellevurdert)
Abstract [en]

The current communication present results from work on polymeric composites with extreme temperature performance. We are studying 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). This study in particular investigates how post-cure conditions such as time, temperature and atmosphere influence Tg of the composites. In addition to this we also trace and analyse the consequences of post-cure on weight loss and occurrence of micro-cracks. We are considering three different post-curing temperatures: 400°C, 420°C and 440°C in the study. 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 weight 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.

sted, utgiver, år, opplag, sider
2015.
Emneord [en]
curing, glass transition temperature, cure induced cracking, Polyimide, Materials science - Construction materials
Emneord [sv]
Teknisk materialvetenskap - Konstruktionsmaterial
HSV kategori
Forskningsprogram
Polymera konstruktionsmaterial
Identifikatorer
URN: urn:nbn:se:ltu:diva-37908Lokal ID: c194b6d5-aa27-4566-b750-7a740183db3eOAI: oai:DiVA.org:ltu-37908DiVA, id: diva2:1011406
Konferanse
International Conference on Composite Materials : 19/07/2015 - 24/07/2015
Merknad

Godkänd; 2015; 20150818 (joffe)

Tilgjengelig fra: 2016-10-03 Laget: 2016-10-03 Sist oppdatert: 2018-01-16bibliografisk kontrollert

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http://ICCM20.orghttp://iccm20.org/fullpapers/file?f=53Wv4KRAKY

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