Process for analyzing relaxation spectra and resonances in mater

Details Process for analyzing relaxation spectra and resonances in mater Process for analyzing relaxation spectra and resonances in mater

1991-12-06

1992-10-06

Cuchlinski, Jr., William A.

Thermal measuring and testing

Thermal testing of a nonthermal quantity

374 10, 374 31, 374 53, G01N 2500, G01N 2700

Patent

active

051526077

ABSTRACT:
The present invention relates to the use of thermal stimulated processes for analyzing relaxation spectra and resonances in materials. The process is characterized in that at least two coupled excitation fields are applied to the sample of material analyzed along with a programmed temperature variation, with the objective to deconvolute during the thermally stimulated recovery stage the global deformation resulting from the excitation stage, i.e. obtain one by one the individual and elementary relaxation motions responsible for the global deformation, whether these elementary internal motions be of mechanical, electrical or magnetic origin. The process is characterized in the fact that the relaxation spectra for the motions resulting from the coupling between mechanical and electrical (and/or electromagnetical) excitations are obtained at the same time and are inter-related.

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Demont, Ph. et al., "Thermally Stimulated Creep for the Study of Copolymers and Blends," Polymer Characterization, Chapter 11 (1990).

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