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Thermal degradation of polyurethanes containing lignin studied by TG‐FTIR
Author(s) -
Hirose Shigeo,
Kobashigawa Ken,
Izuta Yoshinobu,
Hatakeyama Hyoe
Publication year - 1998
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(199811)47:3<247::aid-pi966>3.0.co;2-f
Subject(s) - fourier transform infrared spectroscopy , thermogravimetry , degradation (telecommunications) , lignin , nitrogen , raw material , materials science , infrared spectroscopy , thermal stability , kraft paper , nuclear chemistry , chemistry , chemical engineering , organic chemistry , composite material , inorganic chemistry , telecommunications , computer science , engineering
Thermal degradation of polyurethanes (PUs) having various kraft lignin (KL) contents in nitrogen and also in air was studied by simultaneous thermogravimetry and Fourier transform infrared spectroscopy TG‐FTIR. Changes of volatile products at various temperatures were analysed. Differences in TG curves and FTIR spectra of PUs and raw materials were observed, suggesting that the thermal degradation mechanism of PUs is different from that of raw materials. The amounts of thermal degradation products having characteristic functional groups changed according to the KL contents in the PUs. Thermal degradation in nitrogen apparently proceeded in one step, while it proceeded in two steps in air. This marked difference suggested that an oxidation reaction occurred during the thermal degradation of PUs in air. © 1998 Society of Chemical Industry