On-Line Auto Mass Measurement of Residual Solvent Mass and its Influence on Mechanical Properties of Propellants

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• 作者：Mei Chen ; Yuanbo Zhang ; Chaoyang Dong and Zhenggang Xiao
• 刊名：Propellants, Explosives, Pyrotechnics
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：41
• 期：6
• 页码：972-977
• 全文大小：671K
• ISSN：1521-4087

文摘

An on-line auto mass measurement approach was applied to study the volatilization of residual solvents during the drying process of a single-based propellant, a double-based propellant containing triethyleneglycol dinitrate (TEGDN propellant, denoted as TEGDN-1) and a TEGDN propellant containing RDX (denoted as TEGDN-2). Drying experiments were conducted at a temperature of 50 °C, steady humidity, and atmospheric pressure. According to the drying rate curves obtained by the on-line auto mass measurement approach, it took 44 h, 31 h and 38 h, respectively, for the residual solvent contents of the three kinds of propellants to come to an equilibrium point, which is approximately below 1 %. The mechanical properties of propellant strands with different residual solvent contents were tested by a universal testing machine and dynamic thermomechanical analysis (DMA). The results indicate that the mechanical properties of the single-based propellant, TEGDN-1 and TEGDN-2 are influenced by the residual solvent content. The propellant strands are sufficiently plastic and elastic to be cut without being deformed at a broad range of temperature when they are dried to residual solvent contents of 5.8–3.6 %, 9–5.7 %, and 9.7–6.2 %, respectively. In the drying experiment, the on-line auto measurement approach of the residual solvent mass of propellant strands is a highly promising method in view of its improvement in the cutting efficiency of propellant strands.