Process cure monitoring of unsaturated polyester resins, vinyl ester resins, and gel coats by Raman spectroscopy

Mikael Skrifvars (Corresponding Author), Pentti Niemelä, Rauli Koskinen, Osmo Hormi

Research output: Contribution to journalArticleScientificpeer-review

32 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)1285-1292
JournalJournal of Applied Polymer Science
Volume93
Issue number3
DOIs
Publication statusPublished - 2004
MoE publication typeA1 Journal article-refereed

Keywords

  • composites
  • curing of polymers
  • Raman spectroscopy
  • resins
  • gel time

Fingerprint Dive into the research topics of 'Process cure monitoring of unsaturated polyester resins, vinyl ester resins, and gel coats by Raman spectroscopy'. Together they form a unique fingerprint.

  • Cite this