@article{DEMIREL_Rahman_KARACAN_2021, title={Structural Characterization of Thermally Stabilized Poly(acrylonitrile) Fibers by Means of X-ray Diffraction, FT-IR Spectroscopy, and TGA Analysis}, volume={5}, url={http://icontechjournal.com/index.php/iij/article/view/159}, DOI={10.46291/ICONTECHvol5iss2pp1-9}, abstractNote={<p>The structure and effects of thermally stabilized PAN original fibers were characterized utilizing a mixture of volume density, color change observations, flame tests, X-ray diffraction (XRD), infrared spectroscopy (FT-IR), and thermogravimetric analysis (TGA) measurements. The results obtained from the analysis of XRD work showed the conversion of the original molecular structure from a highly laterally ordered condition to a disordered amorphous structure. The experimental results acquired from FT-IR analysis indicated rapid and concurrent aromatization and dehydrogenation reactions assisted by the formation of oxygen-containing functional groups. TGA analysis showed a carbon yield of 72% at 1000 °C. The application and use of NH<sub>4</sub>Br pretreatment are expected to increase the productivity of carbon fiber processing at lowered cost by significantly reducing the processing time necessary for the successful completion of thermal stabilization reactions.</p>}, number={2}, journal={ICONTECH INTERNATIONAL JOURNAL}, author={DEMIREL, TUBA and Rahman, Md. Mahbubor and KARACAN, Ismail}, year={2021}, month={Jun.}, pages={1–9} }