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用动态热机械分析仪测定了65℃下双基固体推进剂H 01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。H 01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 behavior of double-base solid propellant H 01 at 65 ℃ was measured with a dynamic thermomechanical analyzer. In the low temperature range (-10 ~ 40 ℃), the tanδ value decreased obviously with the increase of aging time, and the β relaxation peak became more and more obvious. The values of peak temperature, dynamic compliance J ’and J “, and the dynamic modulus E’ and E” of the α relaxation relaxation loss tangent tan δ, and the superimposed vertical displacement factor of the dynamic compliance J ’and J “ With the aging time there is a certain law.TG-DTG test showed that with the aging time increases, the sample mass loss at 183 ℃ gradually decreased, indicating that the plasticizer content decreases with increasing aging time.Therefore, Structural relaxation caused by the ”physical aging", which is caused by the above mechanical loss with the aging time is another major reason.