关键词: 催化剂;复合推进剂;燃速;压力指数;热分析

Abstract: A series of experiments have been done to study the cata-lystic procedure of a copper-containing organic chelatc (TP) which can effectively promote the burning-rate of propellant and reduce burning-rate pressure exponent when being used as burning rate catalyst in AP/HTPB propellant. The thermal decomposition process of AP oxidizer and HTPB polymer binder, with or without catalyst, is examined by using thermalanalysis method (TG and HPDTA) . Both sandwich and propellant samples are used to conduct combustion experiments, and their quenched surfaces are gained by rapid depressurization. These quenched surfaces are then examined under SEM and XPS. It can be shown from these experimental results that during the combustion of the AP/HTPB composite propellant, TP being to decompose once it is heated to a temperature at which the AP high temperature decomposition will happen. The decomposition products emitted by TP then react with the oxidizer (AP) or AP decomposition products to form some new compounds which can effectively promote the high temperature decomposition of the AP oxidizer, thus promote the burning rate of AP/HTPB propellant.

Key words: Catalyst;Composite propellant;Burning rate;Thermal analysis