Chitwan, R;
Nistal, A;
Falzon, BG;
Hawkins, SC;
(2017)
Mode i interlaminar fracture toughness of carbon nanotube web-modified polymer composites.
In:
Proceedings of the 21st International Conference on Composites Materials (ICCM-21).
(pp. p. 4133).
ICCM: Xi'an, China.
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Full paper - Mode I Interlaminar Fracture Toughness of Carbon Nanotube Web-Modified Polymer Composites (RAVI).pdf - Published Version Download (1MB) | Preview |
Abstract
Carbon nanotube ‘webs’ (CNTWs) are used as interlayers between marine grade (HMC/SE84LV) and aerospace grade (IM7/977-2) carbon fibre-reinforced polymer (CFRP) composite laminates to explore their influence on mode I interlaminar fracture toughness (ILFT). Inserting CNTW in SE84LV laminates improves the mode I ILFT by 4% whereas inserting CNTW in 977-2 laminates reduces the mode I ILFT by 85%. Fractography and interfacial analysis show that SE84LV resin penetrated and adequately wetted the CNTW whereas 977-2 resin failed to penetrate and wet the CNTW which resulted in large void formation and created a weak interlaminar region. To counter the poor penetration of 977-2 resin, CNTW was impregnated with neat 977-2 resin prior to its insertion in the prepreg layup. Inserting preimpregnated CNTW resulted in a 68% reduction in mode I ILFT. It is proposed that the reduction in mode I ILFT of IM7/977-2 system interleaved with CNTW was due to the restricted resin mobility in the CNTW region and the poor interaction between CNTW and 977-2 resin. The 977-2 remains at minimum viscosity for a shorter time than SE84LV. Remaining at low viscosity for a longer period allows the resin to flow in the CNTW region. The weak interaction between CNTW and the 977-2 resin is discussed in terms of the polarity of the constituent polymer molecules. 977-2 is more polar than SE84LV thus has a very low affinity to interact with CNTW.
| Type: | Proceedings paper |
|---|---|
| Title: | Mode i interlaminar fracture toughness of carbon nanotube web-modified polymer composites |
| Event: | 21st International Conference on Composites Materials (ICCM-21) |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | http://www.iccm-central.org/Proceedings/ICCM21proc... |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Carbon nanotube web, interlaminar fracture toughness, Toughened epoxy resin, Multifunctional hierarchical composites. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10059411 |
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