增塑剂类型对浇注PBX药浆表观粘度的影响

采用分子动力学(MS)Blend方法,对端羟基聚丁二烯(HTPB)粘合剂与增塑剂癸二酸二辛酯(DOS)、己二酸二辛脂(DOA)、壬酸异癸酯(IDP)共混体系相容性进行了模拟计算,并对质量比1∶1 HTPB-Ⅲ/增塑剂及其84%固相填料浇注PBX药浆不同温度时的粘度进行了测试。结果表明:根据Blend法,可以得出增塑剂优劣次序依次为HTPB/IDP、HTPB/DOA、HTPB/DOS;随着温度升高,药浆表观粘度降低;不同增塑剂药浆表观粘度不同,其粘度从小到达依次为IDP、DOA、DOS,药浆表观粘度测试结果与模拟计算结果一致。

Influences of Plasticizer Types on the Apparent Viscosity of Casting PBX Slurry

The blending systems formed by hydroxy terminated polybutadience(HTPB) and different conventional plasticizers (dioctyl sebacate DOS,dioctyl adipate DOA,pelargonic acid,isodecyl ester IDP) were calculated respectively through the Blend method of molecular dynamics,to predict the miscibility of these components,and the casting PBX slurry of HTPB/plasticizers of which the mass ratio is 1:1,and its 84％ solid filler were tested,under different temperature to get the apparent viscosity.The results show that the order of the compatibility of the blend system from high to low through Blend method is HTPB/IDP,HTPB/DOA,HTPB/DOS,and the apparent viscosity of the slurry decreased as temperature rising,differs as different plasticizer blended with,and of which the order from low to high is IDP,DOA,DOS.The apparent viscosity of the slurry obtained through test is in inline with the calculated results.