Abstract
A rheology sensor for monitoring the dynamic viscosity of a thermally curing resin is described. The complex shear modulus of the resin at 1 MHz is derived from the measured reflection coefficient of shear wave pulses at the resin surface. A special transducer-buffer assembly has been developed that operates at high temperature (T = 145°C) and provides a reference calibration signal. With this assembly, absolute determinations are made throughout the cure cycle of the real and imaginary components of the shear modulus. From the latter high-frequency dynamic viscosity is calculated. The results are compared with data obtained at low shear rates with a 10 Hz torque viscometer.
Original language | English (US) |
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Pages (from-to) | 263-269 |
Number of pages | 7 |
Journal | IEEE transactions on ultrasonics, ferroelectrics, and frequency control |
Volume | 34 |
Issue number | 2 |
DOIs | |
State | Published - Mar 1987 |
All Science Journal Classification (ASJC) codes
- Instrumentation
- Acoustics and Ultrasonics
- Electrical and Electronic Engineering