caa a22 4500 463228936 CHVBK 20180405153235.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10853-007-1838-9 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1838-9 Microstructural evolution during thermal stabilization of PAN fibers [Elektronische Daten] [Dong-Xin He, Cheng-Guo Wang, Yu-Jun Bai, Ning Lun, Bo Zhu, Yan-Xiang Wang] Thermally stabilized polyacrylonitrile (PAN) fibers were produced by multi-stage thermal stabilization between 190 and 270°C. X-ray diffraction (XRD) and Fourier Transform infrared (FT-IR) spectroscopy were used to investigate the structure of PAN fibers and the stabilized fibers. A new diffraction peak appears at 2θ=23.2° in XRD pattern of the stabilized fibers besides the peaks in that of PAN fibers. The distinct structural changes were also observed from FT-IR spectra, the intensities in the 2,936-2,918, 2,244-2,236, and 1,451-1,446cm−1 regions decrease remarkably, and new peaks occur at 1,594 and 1,700cm−1 (shoulder-like peak) which correspond to the stretching vibration of C=N and C=O groups, respectively. The ultramicrotomy to prepare samples of PAN fibers and the stabilized PAN fibers was explored to characterize their microstructures by high-resolution transmission electron microscopy (HRTEM). The HRTEM images further verified the microstructural changes of PAN fibers during thermal stabilization, and the detailed information was given that thermal stabilization is accompanied by a new structure forming inside the crystallites in PAN fibers, and the (110) plane of PAN fibers transforms preferentially. Springer Science+Business Media, LLC, 2007 He Dong-Xin Department of Material Science and Engineering, Shandong Institute of Light Industry, 250353, Jinan, Shandong, P.R. China aut Wang Cheng-Guo College of Material Science and Engineering, Shandong University (South Campus), 250061, Jinan, P.R. China aut Bai Yu-Jun College of Material Science and Engineering, Shandong University (South Campus), 250061, Jinan, P.R. China aut Lun Ning College of Material Science and Engineering, Shandong University (South Campus), 250061, Jinan, P.R. China aut Zhu Bo College of Material Science and Engineering, Shandong University (South Campus), 250061, Jinan, P.R. China aut Wang Yan-Xiang College of Material Science and Engineering, Shandong University (South Campus), 250061, Jinan, P.R. China aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/17(2007-09-01), 7402-7407 0022-2461 42:17<7402 2007 42 10853 https://doi.org/10.1007/s10853-007-1838-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1838-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- He Dong-Xin Department of Material Science and Engineering, Shandong Institute of Light Industry, 250353, Jinan, Shandong, P.R. China aut NATIONALLICENCE 700 1- Wang Cheng-Guo College of Material Science and Engineering, Shandong University (South Campus), 250061, Jinan, P.R. China aut NATIONALLICENCE 700 1- Bai Yu-Jun College of Material Science and Engineering, Shandong University (South Campus), 250061, Jinan, P.R. China aut NATIONALLICENCE 700 1- Lun Ning College of Material Science and Engineering, Shandong University (South Campus), 250061, Jinan, P.R. China aut NATIONALLICENCE 700 1- Zhu Bo College of Material Science and Engineering, Shandong University (South Campus), 250061, Jinan, P.R. China aut NATIONALLICENCE 700 1- Wang Yan-Xiang College of Material Science and Engineering, Shandong University (South Campus), 250061, Jinan, P.R. China aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/17(2007-09-01), 7402-7407 0022-2461 42:17<7402 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer