关键词: 端羟基聚丁二烯推进剂;推进剂粘度;临界温度;流动特性

Abstract: The flow viscosity of HTPB prepolymer was studied.Results show that a critical flow temperature ( T c)existed in relationship between logarithmic value of viscosity and temperature.The viscosity changed rapidly when temperature was below.The viscosity change slowly when temperature was over T c. T c increased with the average molecular weight of HTPB prepolymer and decreased with the content of di(2 ethyl hexyl)sebacate as pllasticizer.

Key words: Hydroxy terminated polybutadiene propellant;Propellant viscosity;Critical temperature;Flow characteristic