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Noninvasive Monitoring of Polymer Curing Reactions by Dielectrometry

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4 Author(s)
García-Baños, B. ; Inst. for the Applic. & Adv. Commun. Technol. (ITACA), Tech. Univ. of Valencia, Valencia, Spain ; Canós, A.J. ; Peñaranda-Foix, F.L. ; Catalá-Civera, J.M.

A microwave sensor system for the noninvasive monitoring of the curing process of a thermoset material placed inside a metallic mold is described. The microwave sensor is designed as an open-ended coaxial resonator with a curved surface adapted to the mold inner shape. The analysis of the microwave resonator comprises a recently developed method for deembedding the effect of coupling network in overcoupled resonators, so the range of permitted measurements encompass both low and high dielectric losses of polymeric materials. Results show that noninvasive, continuous monitoring of the microwave dielectric properties of the thermoset material can be performed in real time, allowing one to check initial conditions and to verify the evolution of the cure process.

Published in:

Sensors Journal, IEEE  (Volume:11 ,  Issue: 1 )