硝胺填料HMX的聚合-包覆改性及其应用

Coating Modification of Nirtramine HMX by Polymerization and Its Application

研究羟乙基丙烯酸酯 -丙烯酸酯 -丙烯腈共聚物 (PHMA)与异佛尔酮二异氰酸酯(IPDI)的乳液聚合反应对硝胺晶体填料 HMX的包覆及其对含能复合材料力学性能的影响 .通过 XPS测试研究预聚物在 HMX表面的吸附及聚合包覆的效果 ,得到最佳的反应条件 .通过静态力学性能测试测定复合材料的力学性能 .XPS测试表明 ,乳液聚合比溶液聚合更有利于交联反应在 HMX表面进行 .乳液聚合 -包覆工艺条件为反应温度 4 5℃ ,反应时间 12 0 min,预聚物质量为 0 .15～ 0 .2 0 g时包覆效果最好 .包覆的 HMX用于含能复合材料 ,材料的拉伸强度提高了 2 1.3% ,表明在硝胺

To study the coating on the nitramine HMX particle surfaces by using emulsion polymerization of HEA AN MA(PHMA) copolymer and isophorone diisocyanate and the effect of the coated HMX on the mechanical properties of the energetic composite, based on the data of coating degree from XPS measurements, the effect of the absorption of PHMA and the coating effect were determined. A suitable processing technique for applying the coatings was developed in an emulsion system. The mechanical properties were determined by the static mechanical measurement method. Based on the data of coating degree from XPS measurements, the method of the emulsion polymerization was superior to that of the solution polymerization in the crosslinking of PHMA with IPDI on the surface of HMX. The optimal processing condition of the emulsion polymerization was the temperature 45 ℃, the time of reaction 120 min and the amount of prepolymer between 0 15～ 0 20 g. The sufficiently coated HMX fillers were incorporated into an energetic composite. An increase of the tensile strength was obtained. It is shown that forming a crosslinked polymeric coating on HMX particle surfaces plays a role for interfacial reinforcement between HMX fillers and polymeric binders.