Hu Jinghui, Tang Weiqiang, Li Yonghui, He Jiyu, Guo Xiaoyan, Yang Rongjie
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
Polymers (Basel). 2020 Jan 31;12(2):278. doi: 10.3390/polym12020278.
A new energetic curing reagent, Glycidyl azide polymer grafted tetrafunctional isocyanate (N100--GAP) was synthesized and characterized by FT-IR and GPC approaches. Polytriazole polyethylene oxide-tetrahydrofuran (PTPET) elastomer was prepared by N100--GAP and alkynyl terminated polyethylene oxide-tetrahydrofuran (ATPET). The resulting PTPET elastomer was fully characterized by TGA, DMA, FTIR and mechanical test. The above analysis indicates that PTPET elastomers using N100--GAP as curing reagent have the potential for use in propellants. The overall formulation test of the composite propellants shows that this curing system can effectively enhance mechanical strength and bring a significant improvement in the interface interaction between the RDX & AP particles and binder matrix.
合成了一种新型高能固化剂——缩水甘油叠氮聚合物接枝四官能异氰酸酯（N100 - GAP），并通过傅里叶变换红外光谱（FT - IR）和凝胶渗透色谱（GPC）方法对其进行了表征。采用N100 - GAP和炔基封端的聚环氧乙烷 - 四氢呋喃（ATPET）制备了聚三唑聚环氧乙烷 - 四氢呋喃（PTPET）弹性体。通过热重分析（TGA）、动态热机械分析（DMA）、傅里叶变换红外光谱（FTIR）和力学测试对所得的PTPET弹性体进行了全面表征。上述分析表明，使用N100 - GAP作为固化剂的PTPET弹性体具有用于推进剂的潜力。复合推进剂的整体配方测试表明，该固化体系可有效提高机械强度，并显著改善黑索今（RDX）与高氯酸铵（AP）颗粒和粘合剂基体之间的界面相互作用。
