Energetic binder - P(AMMO-ab-EG) alternate block copolyethers with strict controlled segment length
JOURNAL OF MOLECULAR STRUCTURE(2024)
摘要
The flexibility of high energy polymers is hindered by bulky and polar high energy groups, resulting in reduced mechanical properties. In this paper, poly(3-azidomethyl-3-methyloxetane-glycol) (P(AMMO-ab-EG)) with an alternating block structure was synthesized and characterized. Diethylene glycol and triethylene glycol are used to improve flexibility, which length in this polymer structure is tightly controlled. (P(AMMO-ab-EG)) exhibits good flexibility, suitable viscosity and good thermal stability. It was found that P(AMMO-ab-DEG) exhibited a lower glass transition temperature but higher viscosity and better temperature viscosity sensitivity than P (AMMO-ab-TEG). These results demonstrate that fine tuning of the block length has a greater effect on Tg than on viscosity. This finding is of great significance to prepare energetic polymers with good processing properties and lower Tg value. Al, the prepared (P(AMMO-ab-EG) has excellent compatibility with NG (nitroglycerine) and NP (bis(2,2-dinitropropyl)acetal and bis(2,2- dinitropropyl)formal).
更多查看译文
关键词
Energetic materials,Click chemistry,Segmented copolymers,Alternate sequence,Azide polymer
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要