关键词: 端羟基聚丁二烯推进剂;推进剂燃烧催化剂;推进剂燃烧性能

Abstract: A series of experiments have been conducted to study the influence of burning rate catalysts upon the combustion characters of the hydroxy terminated polybutadiene(HTPB)composite propellants. The catalysts being used are copper chromite(C.C), copper containing organic complex compound(TP),and a mixture of Cu, Cr, Pb salts(TX).The Catalyst is added into the propellant either by mixing with other components of the propellant or by doping with Ammonium Perehlorate(AP)through recrystallization. TG, DTA and HPDTA are used to study the thermal decomposition properties of the following samples. AP, HTPB binder, mixtures of catalysts and AP oxidizer, mixtures of catalysts and HTPB polymer binder, AP oxidizer doped with catalyst.The burning rates of AP/HTPB propellants and AP/HTPB sandwitches are measured, with the same composition and the same components but different adding method and position,The quenched surface of propellants gained by rapid depressurization is examined by X-ray ph-otoelectron spectroscopy.It is found that these three catalysts can promote the exothermic reaction in the condensed phase of the AP oxidizer and that the catalyst doped in AP is more efficient in promoting the burning rate of the propellant.The following can also be concluded from this work: AP oxidizer doped with catalyst increase not only its contact area but also the reaction time with the catalyst.Some burning rate catalysts may have different catalystic mechanism if they are added into propellants in different way.The catalyst being doped into AP crystal can change the density of the AP crystal.

Key words: Hydroxy terminated polybutadiene propellant;Combustion catalyst of propellant;Combustion property of propellant