Decomposição térmica de espumas de poliuretano para fabricação de vitrocerâmica celular de Li2O-ZrO2-SiO2-Al2O3 (LZSA)

Química Nova

Cristian Berto Da Silveira²  Jairo A. Escobar¹  Miguel W. Quintero¹  Eliandra De Sousa¹  Elisângela Guzzi De Moraes¹  Antônio Pedro Novaes De Oliveira¹  Carlos Renato Rambo¹  Dachamir Hotza¹ 

[1] ,Universidade do Estado de Santa Catarina Centro de Ciências Agroveterinárias Lages SC ,Brasil

关键词: PUR foams;    cellular ceramics;    glass ceramics;   

DOI  :  10.1590/S0100-40422007000500010

来源: SciELO

【 摘 要 】

Characterization of the thermal decomposition of polyurethane (PUR) foams was performed by Fourier-transformed infrared (FT-IR) spectroscopy and thermogravimetric analysis (TGA). Three main weight loss paths were observed by TGA, the residue being lower than 3 wt.% for 3 different PUR foams analyzed. FT-IR spectra indicated CO2, CO, NH3 and isocyanides as main decomposition products. PUR foams of different cell sizes were immersed in a slurry of the parent glass ceramic of composition Li2O-ZrO2-SiO2-Al 2O3 (LZSA) and submitted to heat treatment. The LZSA cellular glass ceramics obtained after sintering and crystallization resembled the original morphology of the PUR foams.

【 授权许可】

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