Both better mechanical and rheological properties are pursued for composite solid propellant. In this work, varying proportions of a modified hyperbranched polyester (MHBPE) were added to HTPE/AP/Al propellant. The static tensile property as one kind of mechanical properties of MHBPE/HTPE/AP/Al propellant were found to be superior to those of blank HTPE/AP/Al propellant as a result of the entanglement and interpenetration of molecular chains caused by the introduction of the hyperbranched structure. Evaluations on the related improved creep resistance and stress relaxation performance further demonstrated the advantages of introduction of MHBPE to HTPE/AP/Al propellant. Rheological properties of HTPE/AP/Al propellant with and without MHBPE during the casting process were investigated and compared and the results confirmed the improvement benefiting from low viscosity and loose void structure. Thus, modified hyperbranched polyester provided a novel route to potentially meet the requirements for propellant manufacturing and applications.

复合固体推进剂具有更好的机械和流变性能。在这项工作中，将不同比例的改性超支化聚酯（MHBPE）添加到HTPE / AP / Al推进剂中。由于MHBPE / HTPE / AP / Al推进剂的一种力学性能，其静态拉伸性能优于空白HTPE / AP / Al推进剂，这是由于引入了MHBPE / HTPE / AP / Al推进剂引起的分子链的缠结和互穿。超支化结构。有关改进的抗蠕变性和应力松弛性能的评估进一步证明了将MHBPE引入HTPE / AP / Al推进剂的优势。研究并比较了有和没有MHBPE的HTPE / AP / Al推进剂在流延过程中的流变性能，结果证实了低粘度和疏松空隙结构带来的改进。因此，改性的超支化聚酯提供了一种新颖的途径来潜在地满足推进剂制造和应用的要求。