ULTRASONIC MONITORING OF THERMALLY CURING RESINS WITH THE USE OF SHEAR WAVE REFLECTIVITY.

F. Cohen-Tenoudji, W. J. Pardee, B. R. Tittmann, L. A. Ahlberg, R. K. Elsley

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

A technique is presented for estimating the state of viscosity of a thermally curing resin. The resin's complex shear modulus at 1 MHz is derived from the measured reflection coefficient of shear wave pulses at the tool-resin interface. A special transducer-buffer assembly that operates at high temperature and provides a reference calibration signal has been developed. With this assembly, absolute determinations are made throughout the cure cycle of the storage (real) and loss (imaginary) components of the shear modulus. The high-frequency dynamic viscosity is calculated from the latter. Comparison with data obtained at low shear rates with a 10-Hz torque viscometer indicates the feasibility of using the high-frequency technique to monitor the rheological properties of thermally curing resins.

Original languageEnglish (US)
Pages (from-to)535-542
Number of pages8
JournalUltrasonics Symposium Proceedings
DOIs
StatePublished - 1985

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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