笼形结构硅倍半氧烷提升聚醚复合推进剂力学和燃烧性能研究

Improving Mechanical and Burning Performances of Composite Polyether Propellants by Caged Oligomeric Silsesquioxanes

关键词:  复合推进剂  笼形硅倍半氧烷  力学性能  燃烧性能  铝燃烧

Key words:  Composite propellant  Caged oligomeric silsesquioxane  Mechanical properties  Combustion performance  Aluminum combustion

摘要:

复合推进剂研究者期望寻找能够同时提高复合固体推进剂力学性能、催化燃烧和促进铝燃烧的多功能助剂。笼形硅倍半氧烷（POSS）是一种有机-无机杂化物，本文研究了有机基团为苯基、一硝基苯基、二硝基苯基、氨基苯基的四种POSS以1wt%的含量对端羟基环氧乙烷-四氢呋喃共聚醚（PET）/高氯酸铵/铝粉复合推进剂性能的影响。结果表明：四种POSS化合物，均能够提高推进剂抗拉强度和伸长率，八氨基苯基硅倍半氧烷（OAPS）效果最优；均可提高PET推进剂在3~18MPa的燃速，显著降低10.5~18MPa区间的燃速压强指数（n）；均能够抑制PET推进剂中铝颗粒在燃烧过程中的团聚，明显降低凝聚相燃烧产物的尺寸，八（二硝基苯基）硅倍半氧烷（ODNPS）效果最好。

Abstract:

It is desirable to find multi-functional auxiliaries which can simultaneously improve mechanical properties， catalyze combustion and promote aluminum combustion of composite solid propellants. Caged oligomeric silsesquioxanes （POSS） is a kind of organic-inorganic hybrid. In this paper， four kinds of caged oligomeric silsesquioxanes with the phenyl， nitrophenyl， dinitrophenyl and aminophenyl as organic groups were applied to hydroxyl-terminated ethylene oxide-tetrahydrofuran copolyether （PET）/ammonium perchlorate/aluminum powder composite propellants with 1wt% content. It is obtained that the four kinds of POSS could raise the tensile strength and elongation of the propellants， and the octa（aminophenyl） silsesquioxane （OAPS） is the best； could increase the burning rates of the propellants under 3~18MPa， and significantly decrease the burning rate pressure index under 10.5~18MPa； could inhibit the agglomeration of aluminum particles during combustion， and significantly reduce the size of the condensed-phase combustion products， and the octa（dinitrophenyl） silsesquioxane （ODNPS） is the best.