Dielectric spectroscopy for characterization of the microstructure of copolymers

Saadat, A.; Bernès, A.; Cebeillac, P.; Lamure, A.; Chatain, D.; Lacabanne, C.

doi:10.1109/14.57084

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…The compensation phenomenon is the case when the lines converge to a point called the compensation point at the compensation temperature T e and compensation time x c. The existence of several compensation points is due to the separate ordering of motion in the amorphous state [14]. The collection of Arrhenius lines called the relaxation map shows the relation between the relaxation behaviour of the elementary peaks.…”

Section: Compensation Phenomenamentioning

confidence: 99%

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Thermally stimulated depolarization current of novolac resin

Topić

Katović

1997

Journal of Thermal Analysis

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A novolac phenol-formaldehyde resin was investigated via the thermally stimulated depolarization current, using integral and partial measurements in the temperature range from 137 to 270 K. Tow broadened peaks, assigned as 131 and 132, appeared at about 160 and 190 K. The influence of water and M n was investigated. The activation energy E a vs. T relationship was analysed, and a search was made for compensation phenomena. The distribution of the relaxing dipoles N vs. E a was approximated. Three different relaxation ranges were distinguished. All the motions were attributed to the rotation of the phenyl rings. The differences found are due to the heterogeneity in the resin. Contamination with water increases the polarizability, decreases the structure differences and relieves the motions in the resin. A resin with a smaller ~, exhibits a higher polarizability and a decreases in structure variety.

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Section: Compensation Phenomenamentioning

confidence: 99%

“…In a system with more than one compensation point, the distance between the compensation lines indicates the differences between the regions, domains or phases [14]. In a system with more than one compensation point, the distance between the compensation lines indicates the differences between the regions, domains or phases [14].…”

Section: Compensation Phenomenamentioning

confidence: 99%