Pan-based carbon fibers—present state and trend of the technology from the viewpoint of possibilities and limits to influence and to control the fiber properties by the process parameters

Precursor Structure - Fiber Property Relationships in Polyacrylonitrile- Based Carbon Fibers

“…It is not clear if the higher carbon content, resulting in a more graphitic form, or subtle alterations in morphology (such as the formation of lateral linkages) with little overall change in size and orientation is responsible for the evolution of strengths during intermediate-temperature carbonization. Reduction of fiber tensile strength by graphitization at high temperatures was observed in the case of the 2800'C fiber, and is consistent with observation of earlier investigations [33,34].…”

Development of sizing-free multi-functional carbon fibre nanocomposites

“…The typical properties are given in the Supplementary Data, Table S1. The polymer matrix used was a formulated low viscosity, room temperature-curing, bisphenol A/bisphenol F based epoxy resin, 'IN2 Epoxy Infusion Resin' (EasyComposites) 1 , see Supplementary Data, Table S2. The infusion of the epoxy resin was carried out using an industrially-relevant vacuum-assisted resin transfer moulding (VARTM) process [17].…”

“…Carbon fibre reinforced polymers (CFRP) are key carbon-based materials to industries, such as the aerospace industry, that require mechanically strong materials with high degrees of dimensional stability, whilst minimising the weight of the components [1][2][3]. The reinforcing carbon fibres (CFs) provide the high strength and elastic modulus necessary for critical components, whilst the polymer matrix (typically thermoset, but also thermoplastic) allows the load to be exerted evenly temperatures typically associated with CNT growth (typically 600 -1200 ºC) [16,17] result in thermal degradation to the CFs [16] and removes the polymer sizing.…”

Stabilization of commercial polyacrylonitrile fibres for fabrication of low-cost medium-strength carbon fibres

“…Fitzer states that an increase in the final heat treatment temperature for producing carbon fibres up to 1600°C comes along with an increase of tensile strength and after that temperature there is a sudden reduction of tensile strength [27]. He claims that this reduction is related to nitrogen release from the fibre structure [28]. This finding is 200°C above our results and it is concluded that comonomers as well as fibres' fabrication histories change the variation of tensile strength with heat treatment temperature, too.…”