Torsional braid analysis and gelation in thermoset resins
- 5 September 1989
- journal article
- research article
- Published by Wiley in Journal of Applied Polymer Science
- Vol. 38 (5) , 781-787
- https://doi.org/10.1002/app.1989.070380501
Abstract
The origin of the two damping maxima observed during curing of thermoset resins by torsional braid analysis has been studied using a standard epoxy resin. The first peak is not caused by gelation of the resin, but is due to certain flow phenomena prior to gelation. This first peak always occurs at approximately the same viscosity and is observed only when a fiber braid is used as support. It is therefore, in principle, not possible to detect gelation by torsional braid analysis. The second (vitrification) peak is correct, but it is indicated somewhat too early.Keywords
This publication has 4 references indexed in Scilit:
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