Title :
Space charge formation related to the morphology of polymers
Author :
Krause, Gregor ; Meurer, Dietmar ; Klee, Doris
Author_Institution :
Inst. fur Allgemeine Elektrotech. und Hochspannungstech., RWTH, Aachen, West Germany
Abstract :
Thermally stimulated current measurements were carried out on polypropylene sheet samples to get information about temperature-dependent space-charge formation. The relaxation peak at crystallite melting temperature is related to the separation of stored charge carriers from helix molecules in the crystalline region. The method of thermally stimulated infrared spectroscopy reveals that space charge decay at lower temperatures is connected to the relaxation of helices embedded in the amorphous regions. Observing the growth of electrical trees confirms the fact that charge carriers attach mainly to interfaces of the spherulites (amorphous regions), causing a preferred direction for electrical breakdown
Keywords :
electric breakdown of solids; infrared spectra of organic molecules and substances; polymer structure; polymers; space charge; thermally stimulated currents; TSC; amorphous regions; crystallite melting temperature; electrical breakdown; electrical trees; helix molecules; polymer morphology; polypropylene sheet samples; relaxation peak; space charge formation; spherulites; temperature-dependent space-charge formation; thermally stimulated currents; thermally stimulated infrared spectroscopy; Amorphous materials; Charge carriers; Crystallization; Current measurement; Electric breakdown; Infrared spectra; Morphology; Polymers; Space charge; Temperature;
Conference_Titel :
Electrets, 1988. (ISE 6) Proceedings., 6th International Symposium on (IEEE Cat. No.88CH2593-2)
Conference_Location :
Oxford
DOI :
10.1109/ISE.1988.38529
