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Process cure monitoring of unsaturated polyester resins, vinyl ester resins, and gel coats by Raman spectroscopy
RISE, Swerea, Swerea SICOMP.
VTT Electronics.
University of Oulu.
University of Oulu.
2004 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 93, no 3, 1285-1292 p.Article in journal (Refereed)
Abstract [en]

The curing process of unsaturated polyester resins, vinyl ester resins, and gel coats was studied by using a process Raman spectrometer, equipped with a remote fiber-optic probe. The resins were cured and Raman spectra were recorded during the curing reaction. The spectral changes were identified and, from the intensities, the cure process could be monitored. Gel times given by the resin suppliers correlated well with the Raman results. It could also be seen that the curing process continues for a long time, up to several weeks. Postcuring will finally complete the curing process, White and lightly colored gel coats could easily be monitored by Raman spectroscopy, but fluorescent problems were encountered with heavily colored pigments. The curing of laminates containing 50-70 wt % glass fiber mat could also be followed by Raman spectroscopy. © 2004 Wiley Periodicals, Inc.

Place, publisher, year, edition, pages
2004. Vol. 93, no 3, 1285-1292 p.
Keyword [en]
Composites, Curing of polymers, Gel time, Raman spectroscopy, Resins
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-13201DOI: 10.1002/app.20584OAI: oai:DiVA.org:ri-13201DiVA: diva2:973397
Available from: 2016-09-22 Created: 2016-09-22Bibliographically approved

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