关键词: 端羟基聚丁二烯推进剂;老化试验

Abstract: In this paper, the effects of the storage temperature on the ageing characteristics of HTPB propellants have been studied. The experiment was done in air. The ageing characteristies were expressed by the parameters, such as tensile strength, elongation, hardness, and weight loss of HTPB propellants etc. The experimental results have showed that at the same storage temperature, the tensile strength raised, the elongation reduced, the hardness raised and the weight-loss raised a little with the increased of storage-time. The higher storage temperature will accelerate the change of the paramenters.According to the measuring data of the elongation of HTPB propellants, it showed that at the storage temperature given in this paper, the mechanism of the ageing reaction is simular. The E-value of 49.6kJ/mol can be obtained from the Arrhenius polts, and furthermore the (ε/ε0) value vs. Storage-life polts of HTPB propellants can be determined through the formula at 25℃.

Key words: Hydroxy terminated polybutadiene propellant;Ageing test