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
郑梦泽 1张宁 1刘双 1靳鹏 1张锡铭 1刘文皓 1罗运军1
作者信息
- 1. 北京理工大学材料学院,北京 100081;高能量密度材料教育部重点实验室,北京 100081
- 折叠
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.
Abstract
In order to improve the mechanical properties of glycidyl azide polymer(GAP)thermoplastic elastomers,the hy-drogen 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 exhibi-ted different hydrogen bonding behaviors and mechanical properties due to molecular structure.The elastomers with both ten-sile strength and fracture elongation were obtained by physical blending.The tensile strength was higher than 1.5 MPa at 50℃,and the elongation was not less than 300％at-40℃.Compared with the pure HMDI cured elastomers,the low-tem-perature elongation is increased by about 150％,and the high-temperature tensile strength of the IPDI cured elastomers is in-creased by about 1.4MPa,indicating that the energetic thermoplastic elastomers can be obtained with more balanced perform-ance 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Key words
material mechanics/glycidyl azide polymer/GAP/thermoplastic elastomers/hydrogen bonding behavior/polymer physical blend/high and low temperature mechanical properties引用本文复制引用
基金项目
国家自然科学基金(22175024)
爆炸科学与技术国家重点实验室项目(YBKT22-08)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据