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Synthesis of MoO 3 with different morphologies and their effects on flame retardancy and smoke suppression of polyurethane elastomer
Author(s) -
Xu WenZong,
Li ChongChong,
Hu YiXin,
Liu Liang,
Hu Yuan,
Wang PengCheng
Publication year - 2016
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3756
Subject(s) - materials science , cone calorimeter , char , smoke , composite material , polyurethane , combustion , elastomer , chemical engineering , raman spectroscopy , molybdenum trioxide , pyrolysis , molybdenum , organic chemistry , chemistry , physics , optics , metallurgy , engineering
Molybdenum trioxide (MoO 3 ) microrods, nanofibers, and nanoplates were synthesized via the hydrothermal method and high‐temperature calcination method, respectively. Then the MoO 3 was added into polyurethane elastomer, respectively. The flame retardancy and smoke suppression of the composites added with different MoO 3 were studied by thermal gravimetric analysis, cone calorimeter, and smoke density. The results show that the three kinds of MoO 3 with different morphologies could promote the formation of char and possess flame retardancy and smoke suppression, and MoO 3 nanofibers exhibit a higher degree of flame retardancy, and 1 wt% addition could make the peak heat release rate of polyurethane elastomer composites reduce from 881.6 kW m −2 for a pure sample to 343.4 kW m −2 , a decrease by 61.0%. As for smoke suppression, MoO 3 nanoplates possess the best smoke suppression; 5 wt% could decrease a pure sample's smoke density by 41.3% from 361 to 212. Moreover, the char residue of composites after combustion was analyzed by Raman spectra and X‐ray photoelectron spectroscopy, and the flame retardancy and smoke suppression mechanisms of MoO 3 were discussed.