Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The pyrolysis of para-toluene isocyanate
The choice of structural furnishing materials can influence the amount and composition of fumes given off during a fire. Such fumes are often the most dangerous part of the fire because of their irritancy and toxicity. Para-toluene isocyanate is a major intermediate in the pyrolysis of aromatic di-isocyanates which are widely used in polyurethane foam formulations. The pyrolysis of para-toluene isocyanate (p-TI) has been studied quantitatively in a flow system at temperatures of 823 K to 873 K. Qualitative data on aromatic diisocyanate pyrolysis is also interpreted in the context of polyurethane degradation to isocyanates and nitriles. The major products in the decomposition of p-TI were benzonitrile, methylbenzonitrile, phenylisocyanate, toluene and benzene. The orders of the reactions and the Arrhenius parameters for the rate constants have been determined for these major products. Reasonable mechanisms have been derived for the formation of the major gaseous products and for the deposited char, which appears to be a polymer derived from paramethylbenzonitrile.
The pyrolysis of para-toluene isocyanate
The choice of structural furnishing materials can influence the amount and composition of fumes given off during a fire. Such fumes are often the most dangerous part of the fire because of their irritancy and toxicity. Para-toluene isocyanate is a major intermediate in the pyrolysis of aromatic di-isocyanates which are widely used in polyurethane foam formulations. The pyrolysis of para-toluene isocyanate (p-TI) has been studied quantitatively in a flow system at temperatures of 823 K to 873 K. Qualitative data on aromatic diisocyanate pyrolysis is also interpreted in the context of polyurethane degradation to isocyanates and nitriles. The major products in the decomposition of p-TI were benzonitrile, methylbenzonitrile, phenylisocyanate, toluene and benzene. The orders of the reactions and the Arrhenius parameters for the rate constants have been determined for these major products. Reasonable mechanisms have been derived for the formation of the major gaseous products and for the deposited char, which appears to be a polymer derived from paramethylbenzonitrile.
The pyrolysis of para-toluene isocyanate
Die Pyrolyse von Para-Toluolisocyanat
Marks, S.T. (Autor:in) / Metcalfe, E. (Autor:in)
Combustion and Flame ; 107 ; 260-270
1996
11 Seiten, 5 Bilder, 3 Tabellen, 15 Quellen
Aufsatz (Zeitschrift)
Englisch
| British Library Online Contents | 2019
| British Library Online Contents | 1993
Isocyanate - unauffällig, unerkannt, unterschätzt!?
| Tema Archiv | 2006