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为研究与自然贮存环境相关性较好的推进剂加速老化方法,设计了HTPB复合推进剂交变温度加速老化试验,在-10~60℃温度范围内,以3种温度变化速率(10℃/12 h,20℃/12 h,30℃/12 h),分别老化35 d,56 d,91 d后对推进剂进行力学性能测试,基于最大伸长率进行了HTPB推进剂加速老化与自然贮存的相关性分析。结果表明,加速老化过程中推进剂抗拉强度变大、伸长率下降,与自然老化趋势一致;温度变化速率在推进剂老化过程中对力学性能变化有较大影响;交变温度加速老化1 d分别相当于自然贮存9.2 d,13.3 d,19.7 d,交变温度加速老化与自然贮存具有较好的相关性。
In order to study the accelerating aging process of propellants with good correlation with natural storage environment, an accelerated aging test of alternating accelerating accelerators (HTPB) was designed. Three temperature changing rates (10 ℃ / 12 h, 20 ℃ / 12 h, 30 ℃ / 12 h) respectively. The mechanical properties of the propellants were tested after aging for 35 days, 56 days and 91 days respectively. The accelerated aging and natural storage of HTPB propellants were performed based on the maximum elongation Correlation analysis. The results show that the tensile strength and the elongation of the propellants increase during the accelerated aging process, which is consistent with the natural aging trend. The temperature change rate has a great effect on the mechanical properties during the aging process of the propellants. The alternating temperature accelerates the aging 1 d are equivalent to natural storage 9.2 d, 13.3 d, 19.7 d, alternating temperature accelerated aging and natural storage has a good correlation.