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Studies on thermal degradation of benzylidene malononitriles

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Abstract

Thermal decomposition studies have been carried out using flash vacuum thermolysis (FVT) to find out the decomposition temperature for benzylidene malononitriles (BMNs) including 2-chlorobenzylidene malononitrile (cs), a widely used riot control agent. The FVT studies have been carried out in a specially designed all glass assembly at various temperatures ranging from 300 to 600°C. A number of rearranged products along with hydrogen cyanide were obtained as major decomposition products. The products were analysed and the structures were confirmed by GC/MS. the thermal behaviour of BMNs has also been investigated by TG under nitrogen atmosphere. These studies show that the pyrotechnic mixture for tear gas munitions should not have burst temperature above 300°C.

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Authors and Affiliations

  1. Defence Research and Development Establishment, Gwalior, 47400 002, India

    P. K. Gutch, S. K. Raza & R. C. Malhotra

Authors
  1. P. K. Gutch
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  2. S. K. Raza
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  3. R. C. Malhotra
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Correspondence to P. K. Gutch.

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Gutch, P.K., Raza, S.K. & Malhotra, R.C. Studies on thermal degradation of benzylidene malononitriles. Journal of Thermal Analysis and Calorimetry 71, 593–599 (2003). https://doi.org/10.1023/A:1022868213115

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  • DOI: https://doi.org/10.1023/A:1022868213115

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