含不同扩链剂的聚叠氮缩水甘油醚基含能热塑性弹性体的合成与力学性能

Synthesis and Mechanical Properties of Glycidyl Azide Polymer-Based Energetic Thermoplastic Polyurethane Elastomers with Different Chain Extender

采用不同碳链长度的小分子二元醇扩链剂乙二醇、丙二醇、丁二醇、戊二醇和己二醇合成了聚叠氮缩水甘油醚(GAP)基含能热塑性弹性体(ETPUE)。通过凝胶渗透色谱、傅里叶变换红外光谱、动态热机械分析测试和力学性能测试研究了不同扩链剂扩链的ETPUE的性能变化规律。结果表明,当碳原子数大于2时,偶数碳扩链剂的ETPUE的氢键化程度较高,力学性能好;奇数碳扩链剂的ETPUE的氢键化程度较低,力学性能较差;碳原子数为2时,由于链段很短,氢键化程度较低,性能较差。己二醇扩链的ETPUE的综合性能最佳。

The glycidyl azide polymer-based(GAP-based)energetic thermoplastic polyurethane elastomers(ETPUE)were synthesized using different small diols as chain extender.The change tendency of properties of different ETPUE was studied by GPC,FT-IR,DMA and mechanical testing.The results show that in the case of diols with functionality more than 2,the ETPUEs using even diols have stronger hydrogen bonds and better mechanical properties.The ETPUE of odd diols have weaker hydrogen bonds and poorer mechanical properties.The segment of ethylene glycol(EDO)is too short and thus the ETPUEs using EDO are similar to those of the odd series.In general,the ETPUEs using hexanediol(HDO)provide the best performance.