NASA NTRS · 19880025923
Monitoring processing properties of high performance thermoplastics using frequency dependent electromagnetic sensing
Abstract
An in situ NDE dielectric impedance measurement method has been developed for ascertaining the cure processing properties of high temperature advanced thermoplastic and thermosetting resins, using continuous frequency-dependent measurements and analyses of complex permittivity over 9 orders of magnitude and 6 decades of frequency at temperatures up to 400 C. Both ionic and Debye-like dipolar relaxation processes are monitored. Attention is given to LARC-TPI, PEEK, and poly(arylene ether) resins' viscosity, glass transition temperature, recrystallization, and residual solvent content and evolution properties.
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Kranbuehl, D. E., Delos, S. E., Hoff, M. S., Weller, L. W., Haverty, P. D.. 1987-01-01. Monitoring processing properties of high performance thermoplastics using frequency dependent electromagnetic sensing. https://ntrs.nasa.gov/citations/19880025923
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