Ultrasonic characterization of the quality of an epoxy resin polymerization

This work concerns monitoring the polymerization of an epoxy resin and its hardener. An ultrasonic pulse echo technique was used to monitor the attenuation, the phase velocity, and the acoustic impedance of the resin as a function of time. The first two parameters give information about the average...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 1999-01, Vol.46 (1), p.188-196
Main Authors: Faiz, B., Maze, G., Decultot, D., Moudden, A., Aassif, E.H., Ezzaidi, M.
Format: Article
Language:English
Subjects:
Acoustic pulses
Acoustical measurements and instrumentation
Acoustics
Applied sciences
Attenuation
Computer industry
Epoxy resins
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Impedance
Monitoring
Physics
Polymer industry, paints, wood
Polymers
Properties and testing
Pulse generation
Reflection
Technology of polymers
Testing and control
Transducers
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Summary:This work concerns monitoring the polymerization of an epoxy resin and its hardener. An ultrasonic pulse echo technique was used to monitor the attenuation, the phase velocity, and the acoustic impedance of the resin as a function of time. The first two parameters give information about the average state of the hardening of the resin itself. The third parameter, acoustic impedance, indicates the state of the hardening of the resin at the interface with the vessel. These parameters are determined from spectral properties of echoes extracted from the experimental echo waveforms. Experiments were made for different proportions of hardener and allowed a determination of the best mixture (10% of hardener) that corresponds to the manufacturer's recommended value. Analysis of the results shows a progressive hardening from the center of the resin toward the walls of the vessel.
ISSN:0885-3010
1525-8955
DOI:10.1109/58.741532