基于分子结构设计和过程控制的方法合成力学性能优良的聚氨酯弹性体
毕业论文关键词 推进剂 3,3-双(叠氮甲基)环氧丁烷-四氢呋喃共聚醚 热塑性聚氨酯弹性体 含能粘合剂
Title The design and preparation of energetic thermoplastic elastomer based on BAMO-THF azide polyether
Abstract
In order to meet the requirements of energetic binder in new type propellant, which is high-powered,high-burning rate and low-signal, azide thermoplastic elastomer (PBT-TPE) was made through quasi prepolymerization. The PBT-TPE is synhtesized by BAMO-THF (acted as the soft segment) and MDI, DEG (acted as the hard segments). The polyurethane elastomer was characterized by Fourier transform infrared spectroscopy (FTIR). It was also studied by Universal electronic tensile machine for the influence of mechanical property made by different R values and different contents of chain extender.The statistics shows that when R equal to 1.05 and content of DEG is 30%,tensile strength achieve to 3.68MPa and ultimate elongation is 595.7%.
Thermogravimetric analysis was used to study PBT-TPE’s thermal stability. The dynamic thermomechanical analysis was used to measure the relationship between polyurethane’s glass transition temperature and storage modulus with temperature.The storage modulus of thermoplastic elastomer was 2.397MPa at 50℃，
and glass transition temperature is -31.6℃.
Keywords Propellant, BAMO-THF, Thermoplastic polyurethane elastomer，Energetic binder
目 次
1. 引言 1
1.1 推进剂对粘合剂体系的要求 1
1.2 粘合剂对推进剂体系的影响 1
1.3 含能热塑性弹性体种类及性能 2
1.4 含能热塑性弹性体的制备方法 3
1.5 国内外研究进展 4
1.6 论文研究目的和内容 5
1.6.1 研究目的 5
1.6.2 研究内容 5
2 实验部分 7
2.1 含能热塑性弹性体的分子结构设计 7
2.1.1 软段分子结构选择 7
2.1.2 硬段分子结构（二异氰酸酯和扩链剂）的选择 7
2.2 PBT基聚氨酯弹性体的合成 8
2.2.1 实验原料 8
2.2.2 PBT基聚氨酯弹性体的合成工艺 8
2.2.3 PBT基聚氨酯弹性体反应方程式 9
2.3 PBT基聚氨酯弹性体的结构表征 10
2.3.1 傅立叶变换红外光谱(FTIR) 10
2.3.2 力学性能测试 10
2.3.3 热重分析（TG） 10
2.3.4 动态热机械分析（DMA） 10
3 结果与讨论 11
3.1 PBT基聚氨酯弹性体的傅里叶红外光谱 11
3.2 PBT基聚氨酯弹性体的力学性能 11
3.2.1 扩链剂对PBT聚氨酯弹性体力学性能的影响 11