扩链剂对NEPE推进剂力学性能的影响  

Effect of chain extender on the mechanical properties of NEPE propellant

作　　者：赵孝彬[1] 张小平[1] 郑剑[1] 杜磊[2] 

机构地区：[1]湖北航天化学技术研究所,湖北襄樊441003 [2]上海航天技术研究院,上海200233

出　　处：《推进技术》2003年第1期74-79,共6页Journal of Propulsion Technology

摘　　要：采用单向拉伸性能测试研究了三类扩链剂对NEPE推进剂力学性能的影响 ,并用交联密度和凝胶分数测定 ,以及小角X射线散射实验的方法 ,研究分析了扩链剂的作用机理。结果表明 :由于扩链剂消耗了部分固化剂N 10 0 ,导致NEPE推进剂的伸长率增加、拉伸强度下降 ;通过调节扩链剂的含量、提高固化参数及改变推进剂的制备工艺可以提高扩链剂的作用效果 ;扩链剂可以在拉伸强度少量降低的情况下大幅度提高NEPE推进剂的伸长率 ;NEPE推进剂力学性能的提高不是由于微相分离 。The effect of three types of chain extenders on the mechanical properties of NEPE propellant was studied by means of tensile test. The chain extender consumed part of curing agent N-100 on account of a competing reaction between chain extender and PEG with N-100, which resulted in the decrease of the tensile strength and the increase of the elongation of NEPE propellant. The mechanical properties of NEPE propellant can be improved by modifying the content of chain extender as well as increasing the curing parameter and changing the preparation methods of the propellant. The tensile strength of NEPE propellant had a little decrease but the elongation was significantly increased after adding of the chain extender. The improvement of the mechanical properties of NEPE propellant should be attributed to the optimization of network structure of propellant not the microphase separation.

关 键 词：扩链剂 NEPE推进剂 力学性能 影响 聚氨酯推进剂 硝胺推进剂 拉伸强度 

分 类 号：V512.3[航空宇航科学与技术—航空宇航推进理论与工程]