An experimental setup has been developed for the monitoring of ultrasonic parameters during polymerization in the context of the monitoring of composite plate production. An analytical approach is proposed based on the modeling of the wave velocity fitted by a Weibull distribution and was investigated to validate this approach by the Debye series modeling (DSM). The monitoring of the cured epoxy is also performed after curing in order to study the thermal transformation compared with DSC measurements. As a result, an approximated frequency-temperature (f, T) model is proposed for attenuation and velocity frequency and temperature dispersions.
Ghodhbani, N., Marechal, P., & Duflo, H. (2015). Curing and post-curing viscoelastic monitoring of an epoxy resin. In Physics Procedia (Vol. 70, pp. 106–109). Elsevier. https://doi.org/10.1016/j.phpro.2015.08.053