固体火箭技术2017，Vol.40Issue(5)：609-613,5.DOI:10.7673/j.issn.1006-2793.2017.05.014
支化3,3-二叠氮甲基环氧丁烷-四氢呋喃的合成及表征
Synthesis and characterization of branched 3,3-butylene azidomethyl-tetrahydrofuran
王娟 1黄洪勇 2杨建国 1肖乐勤 1周伟良1
作者信息
- 1. 南京理工大学 化工学院,南京 210094
- 2. 中国航天科技集团公司八院806所,湖州 313002
- 折叠
摘要
Abstract
Using 3,3-Bis( azidomethyl) oxetane/Tetrahydrofuran ( PBT) as the starting polyether,branching unit of trifunctional as intiator,PBT with a branched structure ( B-PBT) was synthesized by nucleophilic addition reaction under effect of a certain cata-lyst.The structure,viscosity properties,thermal stability and mechanical properties of the target product were characterized by FTIR, 1H-NMR,viscosity measurements,DSC,TG and tensile test. The results showed that the target product was a kind of azide ether with branched structure.The viscosity of B-PBT (15000 mPa·s/50℃) was significantly lower than that of PBT (23828 mPa· s/50 ℃) . The B-PBT has great thermal stability after branching units were introduced, where the decomposition heat release reached 1481 J/g. The thermal decomposition of B-PBT could be divided into two stages,namely thermal decomposition of the azi-do,scission of branching units and backbone into small molecules.Moreover,the B-PBT elastomers exhibits better mechanical prop-erties (σb=5.29 MPa,εb=516.42%) .关键词
3,3-二叠氮甲基环氧丁烷-四氢呋喃/支化/粘度/热稳定性Key words
3/3-bis( azidomethyl) oxetane/tetrahydrofuran/branched/viscosity/thermal stability分类
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王娟,黄洪勇,杨建国,肖乐勤,周伟良..支化3,3-二叠氮甲基环氧丁烷-四氢呋喃的合成及表征[J].固体火箭技术,2017,40(5):609-613,5.
