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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/2428

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dc.contributor.authorMathur, R B-
dc.contributor.authorMittal, J-
dc.contributor.authorBahl, O P-
dc.contributor.authorSandle, N K-
dc.date.accessioned2007-01-12T09:58:49Z-
dc.date.available2007-01-12T09:58:49Z-
dc.date.issued1994-
dc.identifier.citationCarbon, 32(1), 71-77p.en
dc.identifier.urihttp://eprint.iitd.ac.in/dspace/handle/2074/2428-
dc.description.abstractPolyacrylonitrile precursor has been chemically impregnated with aqueous solution of KMnO4 under varying conditions of temperature and time. FTIR of the as-modified PAN fibres shows a clear peak at 2340 cm−1 corresponding to MnO4—C=N conjugation. Such conjugation helps not only as catalyst for cyclization reaction, but also as plasticizer. Calorimetric studies show that activation energy for cyclization reaction for KMnO4-treated fibres is reduced from 119 KJ/mole to 90 KJ/mole. Experimental results show that the tensile strength of carbon fibres prepared from chemically modified samples goes up to 4.2 GPa, compared to 2 GPa obtained from unmodified samples. More importantly, elongation to break for such carbon fibres is pushed up to 1.82%, compared to 0.9% achieved with unmodified samples. Surface morphology of the treated and carbonized samples has also been investigated using SEM.en
dc.format.extent248576 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.subjectPAN fibreen
dc.subjectKMnO4en
dc.subjectcyclizationen
dc.subjectcatalysten
dc.subjectplasticizeren
dc.subjecttensile strengthen
dc.subjectyoung's modulusen
dc.subjectcarbon fibreen
dc.titleCharacteristics of KMnO4-modified PAN fibres—its influence on the resulting carbon fibres' propertiesen
dc.typeArticleen
Appears in Collections:Chemistry

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