防老剂 H 对 IPDI 丁羟推进剂低温伸长率的影响

EFFECT OF ANTIOXIDANT H ON LOW TEMPERATURE ELONGATION OF IPDI TYPE HTPB PROPELLANTS

研究了防老剂Ｈ对ＩＰＤＩ丁羟推进剂（中燃速和高燃速的ＨＴＰＢ／ＡＰ／Ａｌ推进剂，ＨＴＰＢ／ＡＰ／ＨＭＸ／Ａｌ推进剂）低温力学性能的影响，在常温强度相同的条件下，随着防老剂Ｈ的加入和用量的增加，ＩＰＤＩ推进剂的低温强度升高和低温伸长率显著降低，这种现象是由于防老剂的加入和用量的增加使粘合剂相中硬段微区型物理交联贡献增大，导致推进剂的拉伸脱湿造成的。

The effect of antioxidant H(N,N′ diphenyl p phenylene diamine)on low temperature mechanical performance of IPDI type HTPB propellants(including HTPB/AP/Al propellant with moderate and high burning rate and HTPB/AP/HMX/Al propellant)has been investigated.Keeping constant tensile strenth at room temperature,with the increase of antioxidant H the tensile strenth σ m is increased and the elongation ε m is decreased at low temerature for IPDI propellants.The phenomenon is attributed to tensile dewetting of the propellants,which is resulted from the increase of hard segment domain type physical crosslinks in binder matrix with the adding and increasing of antioxidant H in the propellants