| TRANSFORMATION OF STRUCTURE IN POLYACRYLONITRILE FIBRES DURING STABILIZATION |
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| 作者姓名： | 朱岩 杨序纲 M.A.Wilding S.K.Mukhopadhyay |
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| 作者单位： | Department of Textiles UMIST，Manchester M60 IQD，UK)，Manchester Materials Science Centre，UMIST/University of Manchester，Manchester M60 IQD，UK)，Department of Textiles Industries，University of Leeds，Leeds LS2 9JT，UK，Department of Textiles Industries，University of Leeds，Leeds LS2 9JT，UK |
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| 摘 要： | The Lonversion of polyacrylonitrile(PAN)fibre to carbon fibre consists of an oxidative stabili-zation process in which the PAN fibre is heated between 200-300℃ in air to give a thermally co-herent structure.The structural changes of PAN fibres during stabilization have been investigatedusing Fourier Transform Infrared Spectroscopy(FTIR)and Differential Scanning Calorimetry(DSC).An attempt has also been made to follow the conversion of the structure using Ramanspectroscopy as a complementary technique.The FTIR spectra of the fibres subjected to variousdegree of heat treatment show a continuous decrease in nitrile absorption and a simultaneous in-crease in intensity of the C=N and/or C=C bands as the stabilization proceeds.A conversion ra-tio(CR)is defined as the intensity of the C=N and/or C=C bands relative to that of the nitrilegroups.The exotherm present in the DSC experiments was observed to weaken progressively dur-ing the stabilization process.It is confirmed that the original PAN structure is dissipating and thenew ladder polymer is being formed.
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TRANSFORMATION OF STRUCTURE IN POLYACRYLONITRILE FIBRES DURING STABILIZATION |
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| Zhu Yan.TRANSFORMATION OF STRUCTURE IN POLYACRYLONITRILE FIBRES DURING STABILIZATION[J].Journal of Donghua University,1993(4). |
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| Authors: | Zhu Yan |
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| Abstract: | |
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| Keywords: | polyacrylonitrile(PAN)fibre stabilization FTIR DSC Raman spectroscopy ladder polymer |
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