Electron spin resonance and the structure of carbon fibers

Autor:	L.S. Singer, Janice Breedon Jones
Rok vydání:	1982
Předmět:	Chemistry Mesophase General Chemistry Electron Thermal conduction Molecular physics Spectral line law.invention Transverse plane Nuclear magnetic resonance law Perpendicular General Materials Science Crystallite Electron paramagnetic resonance
Zdroj:	Carbon. 20:379-385
ISSN:	0008-6223
DOI:	10.1016/0008-6223(82)90036-7
Popis:	The ESR properties of 3000°C heat treated fibers derived from mesophase pitch and PAN have been measured and compared with computer-simulated spectra. Conduction electron motional averaging was observed in the PAN- and pitch-based fibers with domains small in the transverse direction. When perpendicular to the applied field, pitch-based fibers with large transverse domains exhibited a complex spectrum indicating no motional averaging by the conduction electrons. Computer-simulated spectra were in agreement with experiment and were useful in the determination of “single crystallite” ESR parameters. The relationship between ESR behavior and fiber structure is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9146f41ebce9921b28a80503e25c2ff9 https://doi.org/10.1016/0008-6223(82)90036-7 Zobrazit plný text záznamu