【作者】 王立； 俞豪杰；

【Author】 Li Wang;Haojie Yu;State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University;

【机构】 浙江大学化学工程与生物工程学院化学工程联合国家重点实验室；

【摘要】 二茂铁及其衍生物是一种重要的燃速催化剂,能有效地调节固体火箭推进剂的燃烧速率和降低其燃烧压力指数。然而,传统的小分子二茂铁基燃速催化剂在推进剂的储存和使用过程中存在着迁移到推进剂表面的问题。这会使得燃速催化剂在推进剂中的分布不均匀,导致推进剂的可储存性变差、燃烧不均匀进而影响推进剂的弹道性能。因此,解决二茂铁基燃速催化剂迁移的问题十分紧迫。研究发现,二茂铁基聚合物可以通过聚合物链之间的缠结来增加二茂铁基燃速催化剂在固体火箭推进剂中的抗迁移性。因此,通过设计支化结构,我们合成了系列二茂铁基支化聚合物,如二茂铁基修饰的支化聚乙烯亚胺和二茂铁基修饰的支化聚醚等。研究表明,支化结构的二茂铁基燃速催化剂能够有效促进高氯酸铵的热分解。同时,由于其具有特殊的支化结构,使得二茂铁基燃速催化剂在固体推进剂中迁移时面临着更大的阻力,因而具有良好的抗迁移性能。此外,在二茂铁基燃速催化剂中引入极性基团也可以增加其抗迁移性能。因此,我们设计合成了一系列带有极性官能团的二茂铁基化合物用作燃速催化剂。研究结果表明,引入了极性基团的二茂铁基燃速催化剂可以与高氯酸铵之间形成氢键,从而增加了其迁移时的阻力。通过在二茂铁基燃速催化剂中引入支化结构与极性官能团,我们成功地解决了传统的小分子二茂铁基燃速催化剂在推进剂的储存和使用过程中存在着迁移到推进剂表面的问题。这些具有特殊结构的二茂铁基燃速催化剂将在固体火箭推进剂中有着重要的潜在应用。更多还原

【Abstract】 Ferrocene and its derivates are an important kind of burning rate catalyst, which can efficiently adjust the burning rate and decrease the pressure index of combustion of soild rocket propellants. However, tranditional small-molecular ferrocene-based burning rate catalysts tend to migrate to the interface of soild rocket propellant during storage, which result in nonuniform distribution of catalyst in soild rocket propellants and subsquently contribute to bad storability, non-uniform combustion and ballistic performances soild rocket. Thus, it’s very urgent to solve the migration problem of ferrocene-based burning rate catalyst.It was discovered that ferrocene-containing polymers exhibited good anti-migration properties through entangment of polymer chains. So, we synthesized a series of branched ferrocene-containing polymers. It was found that these branched ferrocene-containing polymers could accelerate the thermal decomposition of ammonium perchlorate. Meanwhile, because of their special branched topology, they showed excellent anti-migration properties. Introduction of polar groups into ferrocene-based compounds can enhance their anti-migration properties. Hence, we synthesized a series of polar group-containing ferrocene-based compounds as anti-migration burning rate catalysts. It was found that the polar groups in these compounds could form hydrogen bond with ammonium perchlorate. Thus, their migration resistances were increased.In conclusion, we successfully solved the migration problem of tranditional small-molecular ferrocene-based burning rate catalyst by endoring ferrocene with branched topology or polar groups. These ferrocene-containing polymers or compoounds might find potential application in soild rocket propellant.更多还原