In-situ measurement of thermoset resin degree of cure using embedded fiber optic

Giovanni Breglio; Andrea Cusano; Antonello Cutolo; Antonio Maria Calabro; Stefania Cantoni; Gandolfo Di Vita; Vincenzo Buonocore; Michele Giordano; Luigi Nicolais II

doi:10.1117/12.372934

9 December 1999 In-situ measurement of thermoset resin degree of cure using embedded fiber optic

Giovanni Breglio, Andrea Cusano, Antonello Cutolo, Antonio Maria Calabro, Stefania Cantoni, Gandolfo Di Vita, Vincenzo Buonocore, Michele Giordano, Luigi Nicolais II

Author Affiliations +

Proceedings Volume 3859, Optical Online Industrial Process Monitoring; (1999) https://doi.org/10.1117/12.372934
Event: Photonics East '99, 1999, Boston, MA, United States

Abstract

In this work, a fiber optic sensor based on Fresnel principle is presented. It is used to monitor the variations of the refractive index due to the cure process of an epoxy based resin. These materials are widely used in polymer- matrix composites. The process of thermoset matrix based composite involves mass and heat transfer coupled with irreversible chemical reactions inducing physical changes: the transformation of a fluid resin into a rubber and then into a solid glass. To improve the quality and the reliability of these materials key points are the cure monitoring and the optimization of the manufacturing process. To this aim, the fiber optic embedded sensor has been designed, developed and tested. Preliminary results on sensor capability to monitor the cure kinetics are shown. Correlation between the sensor output and conversion advancement has been proposed following the Lorentz-Lorenz law. Isothermal data form the sensor have been compared with calorimetric analysis of an epoxy based resin.

Citation Download Citation

Giovanni Breglio, Andrea Cusano, Antonello Cutolo, Antonio Maria Calabro, Stefania Cantoni, Gandolfo Di Vita, Vincenzo Buonocore, Michele Giordano, and Luigi Nicolais II "In-situ measurement of thermoset resin degree of cure using embedded fiber optic", Proc. SPIE 3859, Optical Online Industrial Process Monitoring, (9 December 1999); https://doi.org/10.1117/12.372934

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