浇注PBX药浆表观黏度的实验研究∗

摘要

以低相对分子质量端羟基聚丁二烯（ HTPB）、己二酸二辛脂（ DOA）制备了HTPB粘结剂体系，再加入铝粉和不同粒径级配的硫酸钠颗粒制备浇注高聚物粘结炸药（ PBX）药浆，然后采用不同的异氰酸酯固化剂进行固化。讨论了硫酸钠粗细粒径配比对浇注PBX药浆黏度的影响，以及不同固化剂对反应物黏度和固化时间的影响。结果表明，当粗细颗粒硫酸钠质量比为3∶1时，浇注PBX药浆黏度最低；异氰酸酯固化剂中加入少量MDI可以提高药浆固化速率，缩短固化时间。%Binder systems of hydroxyl⁃terminated polybutadiene( HTPB) with low molecular weights, dioctyla⁃dipate (DOA),aluminum powder and different particle size gradation sodium sulfate were prepared. The systems were cured with different curing agents. The influence of sodium sulfate gradation on the PBX slurry viscosity and the influence of curing agents on the viscosity and curing time of slurry were discussed. The results showed that, when the mass ratio of sodium sulfate was 3∶1, the viscosity of drug slurry was the lowest. The slurry curing rate and time were increased and shorten when a small amount of MDI was added into isocyanate curing agent.