微量量热法预估硝酸酯火药的安全贮存寿命

The extrapolation equation of NATO STANAG 4582 standard is improved by taking the limit heat flow value as the criterion of safe storage life and using the "temperature coefficient" equation as the "time-temperature equivalence" relationship. Then a new method of "single temperature timing heat flow thermal method" for fast predicting the safe storage life of nitrate propellant by microcalorimetry is established. That is to say, at a single temperature, only a short period of test is needed to predict the safe storage life of nitrate propellant at a specific storage temperature for a specific period of time, or to evaluate the thermal stability of nitrate propellant during a predetermined storage period. The test results show that this method is widely applicable to the evaluation of nitrate propellants such as single-based propellant, double-based propellant, triple-based propellant and modified double-based propellant. This method is based on the safety life criterion of simulating the limit heat flux of large-scale charge system which does not occur thermal explosion in harsh environment. It is more practical and the predicted results are more credible compared with the thermal accelerated aging method based on 50% stabilizer consumption. In addition, this method is on-line detection, without large-scale aging test, which is safe, simple and fast.This method can be used to predict whether nitrate propellant can be safely stored in 10 years within 4.01 days.