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BIBTEX RIS

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

2007; Brazilian Chemical Society; Volume: 30; Issue: 5 Linguagem: Inglês

10.1590/s0100-40422007000500010

ISSN

1678-7064

Autores

Cristian Berto da Silveira, Jairo Arturo Escobar, Miguel W. Quintero, Eliandra de Sousa Trichês, Elisângela Guzi de Moraes, Antônio Pedro Novaes de Oliveira, Carlos R. Rambo, Dachamir Hotza,

Tópico(s)

Flame retardant materials and properties

Resumo

GLASS CERAMICS.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 CO 2 , CO, NH 3 and isocyanides as main decomposition products.PUR foams of different cell sizes were immersed in a slurry of the parent glass ceramic of composition Li 2 O-ZrO 2 -SiO 2 -Al 2 O 3 (LZSA) and submitted to heat treatment.The LZSA cellular glass ceramics obtained after sintering and crystallization resembled the original morphology of the PUR foams.

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