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Please use this identifier to cite or link to this item:
http://hdl.handle.net/2074/2428
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| DC Field | Value | Language |
|---|
| contributor.author | Mathur, R B | - |
| contributor.author | Mittal, J | - |
| contributor.author | Bahl, O P | - |
| contributor.author | Sandle, N K | - |
| date.accessioned | 2007-01-12T09:58:49Z | - |
| date.available | 2007-01-12T09:58:49Z | - |
| date.issued | 1994 | - |
| identifier.citation | Carbon, 32(1), 71-77p. | en |
| identifier.uri | http://eprint.iitd.ac.in/dspace/handle/2074/2428 | - |
| description.abstract | Polyacrylonitrile 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 |
| format.extent | 248576 bytes | - |
| format.mimetype | application/pdf | - |
| language.iso | en | en |
| subject | PAN fibre | en |
| subject | KMnO4 | en |
| subject | cyclization | en |
| subject | catalyst | en |
| subject | plasticizer | en |
| subject | tensile strength | en |
| subject | young's modulus | en |
| subject | carbon fibre | en |
| title | Characteristics of KMnO4-modified PAN fibres—its influence on the resulting carbon fibres' properties | en |
| type | Article | en |
| Appears in Collections: | Chemistry
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| mathurcha94.pdf | | 242Kb | Adobe PDF | View/Open |
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