烯基聚醚含能黏合剂的合成与固化

Synthesis and Curing of Alkenyl Polyether Energetic Binder

摘要:

以三羟甲基丙烷为引发剂、三氟化硼•乙醚络合物为催化剂、 3-硝酸酯甲基-3-甲基氧杂环丁烷（NIMMO）为单体，制备了三官能度的聚NIMMO，随后在其端基共聚烯丙基缩水甘油醚（AGE），合成了烯基聚醚含能黏合剂。采用FTIR和NMR对产物进行了表征。并以四甲基对苯二腈氧化物（TTNO）为固化剂固化合成的烯基聚醚含能黏合剂制备出了弹性体，考察了弹性体的力学和热性能。结果表明：该黏合剂具有低的黏度（20℃黏度为8.93 Pa•s）、较低的玻璃化转变温度(-57.4℃)及可室温固化的特点；定义R为固化剂TTNO的腈氧基团与烯基聚醚含能黏合剂双键的物质的量之比，R=1.0时，得到的弹性体拉伸强度最高可达0.80 MPa，分解峰峰温为202℃。

Abstract:

Tri-functionality polyNIMMO was synthesized by polymerization of NIMMO (3-nitratomethyl-3-methyloxetane) in the presence of trimethylolpropane catalyzed by BF3•OEt2. Then, alkenyl polyether energetic binder was synthesized by polymerization tri-functionality polyNIMMO and AGE (allyl glycidyl ether). The polymer was characterized by FTIR and NMR. Moreover, the mechani-cal properties and thermal properties of elastomer prepared with allyl polyether energetic binder and tetramethyl-terephthalobisnitrile oxide (TTNO) were investigated. The results show that the energetic binder has low viscosity (20℃, 8.93 Pa•s), low Tg(-57.4℃), and can be cured under room temperature; The molar ratio of —CNO and C═C was defineted as R, and when R=1.0, the tensile strength of the elastomer is 0.80 MPa and exothermic peak at 202℃.