Structural Characterization of Thermally Stabilized Poly(acrylonitrile) Fibers by Means of X-ray Diffraction, FT-IR Spectroscopy, and TGA Analysis
DOI:
https://doi.org/10.46291/ICONTECHvol5iss2pp1-9Anahtar Kelimeler:
Stabilized PAN Fibers, Thermal Stabilization, Ammonium Bromide (NH4Br) salts, XRD, FT-IR, TGA.Özet
Termal olarak stabilize edilmiş orjinal PAN liflerinin yapısı ve etkileri, hacim yoğunluğu, renk değişimi gözlemleri, alev testleri, X-ışını kırınımı (XRD), kızılötesi spektroskopi (FT-IR) ve termogravimetrik analiz (TGA) ölçümleri kullanılarak karakterize edilmiştir. XRD çalışmasının analizinden elde edilen sonuçlar, orijinal moleküler yapının yanal olarak düzenli bir durumdan tamamen düzensiz bir amorf yapıya dönüşümünü göstermiştir. FT-IR analizinden elde edilen deneysel sonuçlar, oksijen içeren fonksiyonel grupların oluşumunun yardımcı olduğu hızlı ve eş zamanlı aromatizasyon ve dehidrojenasyon reaksiyonlarını göstermiştir. TGA analizi, 1000 °C'de % 72'lik bir karbon verimi göstermiştir. NH4Br ön işleminin uygulanması ve kullanımının, termal stabilizasyon reaksiyonlarının başarılı bir şekilde tamamlanması için gerekli işlem süresini önemli ölçüde azaltarak düşürülmüş bir maliyetle karbon liflerinin üretkenliğini arttırması beklenmektedir.
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Telif Hakkı (c) 2021 ICONTECH ULUSLARARASI DERGİSİ
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