HAA/T-12对推进剂粘结剂固化反应适用期的影响

THE INFLUENCE OF HAA/T-12 SYSTEM ON THE POT-LIFE OF THE PROPELLANT BINDER CURING REACTION

研究了HAA/T-12固化催化体系对硝酸酯增塑的端羟基共聚醚与多异氰酸酯固化反应的影响。通过改变HAA和T-12的摩尔比,可有效地调节推进剂粘结剂和药浆固化反应的适用期。延长HAA/T-12的放置时间和升高固化温度具有相同的效果,都能使粘结剂固化反应的适用期缩短。端羟基共聚醚与多异氰酸酯固化系统凝胶化时间与固化温度的关系符合Flory凝胶化理论。

This paper gives a study of the influence of the HAA/T-12 catalytic system on the curing reaction of hydroxyl-terminated copolyether with polyisocyanate plasticized by nitrate ester. The pot-life of the propellant binder and slurry was effectively adjusted through changing the molar ratio of HAA to T-12. Prolongation of the lay-by time of HAA/T-12 and raising the curing temperature will achieve the same results in shortening the pot-life of the binder curing reaction. The relationship between the gelation time and the curing temperature of hydroxyl-terminated copolyether with polyisocyanate agrees with Flory's gelation theory.