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Introducing cryomilling for reliable determination of resin content and degree of cure in structural carbon fibre reinforced thermoset composites
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Fereshteh-Saniee, Nessa, Reynolds, Neil, Kelly, Catherine A., Wilson, Peter R., Jenkins, Mike J. and Kendall, Kenneth N. (2018) Introducing cryomilling for reliable determination of resin content and degree of cure in structural carbon fibre reinforced thermoset composites. Composites Part A: Applied Science and Manufacturing, 107 . pp. 197-204. doi:10.1016/j.compositesa.2018.01.004 ISSN 1359-835X.
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WRAP-introducing-cryomilling-reliable-determination-resin-content-degree-cure-Kendall-2018.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (929Kb) | Preview |
Official URL: http://dx.doi.org/10.1016/j.compositesa.2018.01.00...
Abstract
A novel material preparation method is presented that facilitates accurate measurement of the degree of cure and resin content within carbon fibre reinforced polymer composites (CFRPs). When using conventional specimen preparation for standard thermal analysis, it is demonstrated that the experimentally-obtained enthalpy of reaction and resin content varies significantly between analyses. Measurement uncertainties arise because small specimen volumes are extracted from materials that exhibit both macroscopic inhomogeneity and physical discontinuities. To address this issue, representative sample volumes of aligned CFRPs were first cryogenically milled to develop a homogeneous powder before smaller specimens were extracted. The variation in obtained enthalpy of reaction between analyses was reduced from 23% (for conventional specimen extraction) to 1% following cryomilling. The accuracy in measurement of degree of cure for the compression moulding parts was improved 7 times. Further, subsequent FTIR analysis proved that cryomilling did not affect the final chemical structure of the cured material.
| Item Type: | Journal Article | |||||||||
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| Subjects: | T Technology > TP Chemical technology | |||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||
| Library of Congress Subject Headings (LCSH): | Carbon fiber-reinforced plastics, Thermosetting composites, Thermal analysis, Machining, Low temperature engineering, Enthalpy, Epoxy resins | |||||||||
| Journal or Publication Title: | Composites Part A: Applied Science and Manufacturing | |||||||||
| Publisher: | Pergamon Press | |||||||||
| ISSN: | 1359-835X | |||||||||
| Official Date: | April 2018 | |||||||||
| Dates: |
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| Volume: | 107 | |||||||||
| Page Range: | pp. 197-204 | |||||||||
| DOI: | 10.1016/j.compositesa.2018.01.004 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| Date of first compliant deposit: | 28 November 2018 | |||||||||
| Date of first compliant Open Access: | 6 January 2019 | |||||||||
| RIOXX Funder/Project Grant: |
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