Abstract
The thermal decomposition of poly-1-vinyltetrazole (PVT) has been studied by thermogravimetry in isothermal conditions and by DSC and thermal volumetric analysis in non-isothermal conditions. The gaseous and condensed products of thermolysis were identified. It has been shown that nitrogen is the single gaseous product of the thermal decomposition of PVT. Cyanamide and carbodiimide fragments fixed on the polymer carbochain which are able to cyclotrimerize into triazines and isotriazines respectively were identified in the condensed phase. The kinetic curves of the thermolysis in isothermal conditions have a sufficiently long induction period and fit an equation of autocatalysis of the first order. The limiting stage of PVT thermolysis is the opening of the tetrazole rings. The activation energy of this process calculated in isothermal conditions is 148 kJ moP'; in non-isothermal conditions it is 140 kJ mol −1.
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