Autor:	A. T. Kalashnik
Rok vydání:	2002
Předmět:	Exothermic reaction chemistry.chemical_classification Materials science chemistry General Chemical Engineering Copolymer General Materials Science General Chemistry Polymer Composite material Thermal analysis Redox
Zdroj:	Fibre Chemistry. 34:10-17
ISSN:	0015-0541
DOI:	10.1023/a:1015595021817
Popis:	Chemical aspects of transformations of PAN fibres in the stage of thermooxidative stabilization are examined with methods of thermal analysis. The regions of cyclization and oxidation reactions are determined for three PAN copolymers of different composition. It is shown that the cyclization and oxidation reactions appearing on the DSC curves in the form of unseparated exothermic peaks can be separated by selecting the conditions of preliminary heat treatment of the fibres. It was found that preliminary heating of PAN fibres to a certain temperature causes the formation of a structure that does not undergo oxidation on repeated heating. An explanation of this phenomenon is proposed. Loading within certain limits does not affect the course of structural transformations of the fibres during thermooxidative stabilization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c9f89cfd494d081e3d0d53d843816f09 https://doi.org/10.1023/a:1015595021817 Zobrazit plný text záznamu Full text from SpringerLink