共混GAP基含能热塑性弹性体的氢键行为与力学性能  

Hydrogen Bond Behavior and Mechanical Properties of Blended GAP Based Energetic Thermoplastic Elastomers

作　　者：郑梦泽 张宁 刘双[1,2] 靳鹏 张锡铭[1,2] 刘文皓 罗运军[1,2] ZHENG Meng-ze;ZHANG Ning;LIU Shuang;JIN Peng;ZHANG Xi-ming;LIU Wen-hao;LUO Yun-jun(School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;Key Laboratory of High Energy Density Materials,Ministry of Education,Beijing 100081,China)

机构地区：[1]北京理工大学材料学院,北京100081 [2]高能量密度材料教育部重点实验室,北京100081

出　　处：《火炸药学报》2024年第4期365-371,共7页Chinese Journal of Explosives & Propellants

基　　金：国家自然科学基金(No.22175024);爆炸科学与技术国家重点实验室资助项目(No.YBKT22-08)。

摘　　要：为了改善GAP热塑性弹性体的力学性能,采用了DSC、低场核磁测试、静态力学测试和动态力学测试的方法对两种异氰酸酯固化的弹性体共混体系的氢键行为和力学性能进行分析,建立微观结构与宏观性能的关系。结果表明,由于分子结构原因,HMDI固化的GAP热塑性弹性体和IPDI固化的弹性体显示出不同的氢键行为和力学性能,通过物理共混得到了兼具抗拉强度及断裂延伸率的弹性体,50℃下抗拉强度高于1.5MPa,-40℃下延伸率不低于300%,相较于纯HMDI固化的弹性体,低温延伸率提升了约150%,IPDI固化的弹性体高温抗拉强度提升了约1.4MPa,说明通过共混可得到性能更为均衡的含能热塑性弹性体。In order to improve the mechanical properties of glycidyl azide polymer(GAP) thermoplastic elastomers,the hydrogen bond behavior and mechanical properties of two isocyanate cured elastomer blends were analyzed by DSC,low field NMR,static mechanics and dynamic mechanics testing.The relationship between microstructure and macroscopic properties was established.The results showed that the HMDI cured GAP thermoplastic elastomers and the IPDI cured elastomers exhibited different hydrogen bonding behaviors and mechanical properties due to molecular structure.The elastomers with both tensile strength and fracture elongation were obtained by physical blending.The tensile strength was higher than 1.5MPa at 50℃,and the elongation was not less than 300% at-40℃.Compared with the pure HMDI cured elastomers,the low-temperature elongation is increased by about 150%,and the high-temperature tensile strength of the IPDI cured elastomers is increased by about 1.4MPa,indicating that the energetic thermoplastic elastomers can be obtained with more balanced performance by blending.

关 键 词：材料力学 聚叠氮缩水甘油醚 GAP 热塑性弹性体 氢键行为 高分子物理共混 高低温力学性能 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] TQ564[化学工程—炸药化工]