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Science and Technology of Energetic Materials

Vol.68, No.4 (2007)

Research paper

A study on the combustion of 5,5'-azobis-tetrazole aminoguanidine / strontium nitrate as a gas generating agent
Kazuo Iwakuma, Yasuyoshi Miyata, Shingo Date, Makoto Kohga, and Kazuo Hasue
p.95-101

Abstract

Experimental work has been carried out in search for the potential of 5,5'-azobis-tetrazole aminoguanidine (ABAG) / strontium nitrate Sr(NO3)2 mixture as a gas generating agent for airbag inflators. Altering the reducer/oxidizer ratio, linear burning rate, closed vessel test, 60-liter tank test, thermal analysis and qualitative and quantitative analyses of the combustion gases of the mixtures have been carried out, and the results have been compared with those of 5-amino-1H-tetrazole (5-ATZ) / Sr(NO3)2 mixture. The linear burning rate of ABAG / Sr(NO3)2 mixture reached its maximum when the mixture was ABAG rich. Internal pressure of the closed vessel reached its maximum when the mixture was ABAG rich, but the combustion temperature reached its maximum at a stoichiometric ratio. According to 60-liter tank test, the internal tank pressure of ABAG / Sr(NO3)2 was greater than that of 5-ATZ / Sr(NO3)2 and the hazardous gases such as HCN, CO, and NO2 were found in the combustion gases of ABAG / Sr(NO3)2 but the concentration of CO and NO2 gases were less than those of 5-ATZ / Sr(NO3)2. A new decomposition reaction of Sr(NO3)2 was suggested.

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Keywords

5,5'-azobis-tetrazole aminoguanidine (ABAG), Strontium nitrate, Combustion.

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