H01双基推进剂老化的动态力学性能表征(英文)

The Characteristics of Dynamic Mechanical Properties for Aged Double-Base Propellant H01

用动态热机械分析仪测定了65℃下双基固体推进剂H01的老化性能。在低温段（-10～40℃），随老化时间的增加tanδ值有明显下降，β松弛峰也越来越明显。H01的α松弛的损耗角正切tanδ的峰温、动态柔量J＇和J＂的值以及动态模量E＇和E＂、动态柔量J＇和J＂主曲线的叠合垂直位移因子与老化时间存在一定规律。TG-DTG试验表明，随着老化时间的增加，试样在183℃时的质量损失逐渐减小，说明增塑剂含量随老化时间增加而减小。因此，除了因结构松弛造成的“物理老化”外，这是造成上述各力学损耗量随老化时间下降的又一主要原因。

The aging properties of double-base propellant H01 under 65 ℃ were measured by a dynamic mechanical analyzer. In lower temperature range -10～40 ℃, the values of loss tangent tanδ decrease obviously and the peaks of β relaxation become more clear with increasing the aging time. The changes of the peak temperature of tanδ at α relaxation, values of dynamical compliances J＇ and J＂, and superposition vertical shift factors of master curves of storage modulus E＇, loss modulus E＂, J＇ and J＂ for DB propellant H01 with aging times are regular. The TG-DTG test results show that the mass-loss of samples at 183 ℃ decreased as the aging time increased, indicating that the contents of the plasticizer in DB propellant H01 decreased as the aging time increased. Therefore, it is shown that the decrease in the plasticizer must also be a main reason to lead to the decrease in above-mentioned ＂mechanical loss＂, except for the ＂physical aging＂ resulting from the structural relaxation.