The Nitroglycerin Content Distribution in the coating of the solid propellant and the service life prediction of the charge

Abstract

In this paper the distribution of the nitroglycerin (NG) content in the coating of solid double‐base propellant charge during various time at three aging temperatures were found by using thermogravimetric analysis (TG), and the separation and cracking of the coating were observed. The results showed that the differences of NG contents in the coating are significant and are a main reason giving rise to the separation and cracking of the coating. A empiric functional relation of NG content distribution in the coating to the thickness and aging time and temperature was obtained from measured data. On the basis of the NG contents in the boundary layer of the coating contracted with the propellant and times of separation or cracking of the coating. The service life of the charge was predicted.

Low hazard small-scale synthesis and chemical analysis of high purity nitroglycerine (NG)

“…In recent literature the characterisation and material properties of NG have not been thoroughly researched due to the issues previously stated relating to purchasing and smallscale production. The majority of the research into characterising NG is related to propellant research 18,19 , which mainly focuses on the properties of this nitrate ester as an energetic plasticiser 20,21 . Some published infrared spectra exist but most of these are historic and lack the sensitivity of modern instrumentation 13,22,23 .…”