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Thermal degradation behaviors and reaction mechanism of carbon fibre-epoxy composite from hydrogen tank by TG-FTIR

Author:
Zhang, Zhi, Wang, Changjian, Huang, Gai, Liu, Haoran, Yang, Shenlin, Zhang, Aifeng
Source:
Journal of hazardous materials 2018 v.357 pp. 73-80
ISSN:
0304-3894
Subject:
Fourier transform infrared spectroscopy, activation energy, aldehydes, anhydrides, caprolactam, carbon, carbon dioxide, carbon monoxide, epoxides, gases, hydrogen, models, phenol, pyrolysis, reaction mechanisms, spectral analysis, thermogravimetry
Abstract:
Thermal degradation behaviors and reaction mechanism of Carbon fibre-epoxy composite, obtained from Chinese widely applied hydrogen storage tank, were studied by thermogravimetry combined with Fourier transform infrared spectrometry at varying heating rates. The pyrolysis of carbon fibre-epoxy composite mainly occurs at 550–750 K. The average value of final residue is 72.42%. The calculated activation energies increase exponentially from 206.27 KJ/mol to 412.98 KJ/mol with the average value of 276.6 KJ/mol. The fourth reaction order model is responsible for the pyrolysis of carbon fibre-epoxy composite. The absorption spectra of the evolved gases provided the information that the main evolved products are H2O, CO2, CO (acid anhydride, ketone or aldehyde), ε- caprolactam, alcohols and phenol. Moreover, CO group > alcohols > phenol > ε- caprolactam > CO2 > H2O. Epoxy is the main pyrolysis crude material in carbon fibre-epoxy composite.
Agid:
6053575