EPrints@IIT Delhi >
Faculty Research Publicatons  >
Chemistry >

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

Full metadata record

DC FieldValueLanguage
dc.contributor.authorMathur, R B-
dc.contributor.authorMittal, J-
dc.contributor.authorBahl, O P-
dc.contributor.authorSandle, N K-
dc.identifier.citationCarbon, 32(1), 71-77p.en
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.subjectPAN fibreen
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
Appears in Collections:Chemistry

Files in This Item:

File Description SizeFormat
mathurcha94.pdf242.75 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback