氨基甲酸酯基对推进剂工艺性能的影响

Effect of urethane groups on processing behaviour of composite solid propellants

关键词:  聚氨酯推进剂  聚氨基甲酸酯  推进剂性能  推进剂流变学

Key words:  Polyurethane propellant  Polyurethane  Propellant property  Propellant rheology

摘要:

用甲苯二异氰酸酯封端的丁羟粘合剂进行推进剂制药实验 ,经测定药浆流变特性 ,研究了聚氨酯推进剂中氨基甲酸酯基对药浆工艺性能的影响。结果表明 :氨基甲酸酯基对改善聚氨酯推进剂的药浆工艺性能有重要作用。氨基甲酸酯基与相连的粘合剂大分子一起作用 ,可增加推进剂填料颗粒的表面润湿性、分散性和推进剂药浆二相流的连续性 ,从而显著降低药浆屈服值、减少假塑性 ,改善推进剂的工艺性能

Abstract:

By means of rheological characterization an investigation about the effect of urethane groups on the processing behaviour of composite solid propellants was carried out using HTPB terminated on each end by isocyanate groups as binder of propellant.The results showed that urethane groups attached to the HTPB binder play an important role in improving the processing behaviour of propellant slurry ,the interface wetting and the dispersibility of fillers granule. Finally, based on the role of urethane groups, these results could be taken as a guideline for improving processing properties of some polyurethane propellants.