含能材料2024，Vol.32Issue(6)：651-659,9.DOI:10.11943/CJEM2024022
端羟基叠氮呋咱醚氧杂丁烷-HTPE嵌段共聚物合成及内增塑性能
Synthesis and Internal Plasticization of(Azidofurazan-ether based Oxetane)-HTPE Copolymer
摘要
Abstract
Migration and leaching of plasticizers will severely affect the physical and mechanical properties of polymers.In this study,two new monomers,3-(4-nitrofurazan-3-oxy-methyl)-3-bromomethyl oxetane(BrNFMO)and 3,3-bis(4-nitrofura-zan-3-oxy-methyl)oxetane(BNFMO),were synthesized by the combination of 3-nitro-4-hydroxy-furazan and dibromomethyl oxetane(BBMO).Using hydroxy-terminated polyether(HTPE)as macromolecular initiator,three block copolymers containing azide groups were synthesizd by polymerization of BrNFMO,BNFMO and BBMO under the catalysis of boron trifluoride ether followed by azidation process.Then the detonation performance of the designed monomer structure was evaluated by quantum chemistry.Besides,the copolymerization process was optimized by the control variate method,and better copolymerization conditions were obtained.The results show that this series of novel energetic copolymers can further improve the energy level of the binders,and the intramolecular plasticizing strategy can result in energetic polymers with lower glass transition temperature(Tg)and viscosity by introducing azide groups into the polymer through the structure of azidofurazan ether,compared with di-rectly introducing azide groups into the polymer.Tg can be reduced by 5.27℃,viscosity can be reduced by 4.90 Pa·s,and its thermal stability is also improved(thermal decomposition temperature(Td)can be increased by 7.3℃).关键词
呋咱含能聚合物/阳离子开环聚合/含能粘合剂/热稳定性/内增塑Key words
furazan based energetic polymers/cationic ring-opening polymerization/energetic binder/thermal stability/internal plasticization分类
军事科技引用本文复制引用
温昱佳,张婧,窦金康,谭博军,刘宁..端羟基叠氮呋咱醚氧杂丁烷-HTPE嵌段共聚物合成及内增塑性能[J].含能材料,2024,32(6):651-659,9.基金项目
国家自然科学基金(22175139,22105156) National Natural Science Foundation of China(Nos.22175139,22105156) （22175139,22105156）
