HMX与燃烧催化剂共包覆降低NEPE推进剂的压力指数

Lowering the Pressure Exponents of NEPE Propellant by Co coated HMX and Burning rate Catalysts

利用端羟基聚氨酯预聚物乳液与异佛尔酮二异氰酸酯（ＩＰＤＩ） 聚合反应，对ＨＭＸ 和燃烧催化剂进行共包覆研究。选择三羟甲基丙烷作为制备端羟基聚氨酯预聚物的三元醇，使设计的交联包覆层具有抗溶解和抗剪切能力。经过对比，得出合适的乳液聚合包覆工艺条件： 反应温度为４５ ℃，反应时间为１２０ｍｉｎ，预聚物用量为０ ．３０ ～０ ．３５ｇ。将ＨＭＸ与燃烧催化剂的共包覆样品用于制备ＮＥＰＥ推进剂，燃速压力指数下降了０．０４ 。

The co coated HMX particles and burning rate catalysts by emulsion polymerization of OH terminated PU prepolymer and isophorone diisocyanate was studied. During preparation of OH terminated PU prepolymer, tris (hydroxy methyl) propane was chosen as triol monomer to improve the abrasion resistance and solvent resistance of the final crosslinked coatings. The experimental results show that the burning rate pressure exponent of NEPE propellant thereof decreases 0.04 by using co coated HMX and burning rate catalyst. An applicable coating procedure is also given herein.