键合剂1,1′-(1,3-苯二羰基)双-2-甲基氮丙啶的热行为

Thermal behavior of bonding agent 1,1′-(1,3-phenylenedlcarbonyl) bis-2-methyl-aziridine

关键词:  复合推进剂  键合剂  热分解  热分析

Key words:  Composite propellant  Bonding agent  Thermal decomposition  Thermal analysis

摘要:

用DSC和TG DTG等热分析手段研究了过冷态和结晶态的键合剂 1,1’ (1,3 苯二羰基 )双 2 甲基氮丙啶(HX 75 2 )的热行为 ,在 - 80℃～ 10 0℃范围内 ,除了过冷态在 - 37.6℃的玻璃化转变和结晶态在 36 .8℃～ 42 .9℃的熔融外 ,没有任何其它物理化学变化。亚稳态的过冷液体比结晶态有较大的分解热。HX 75 2有复杂的分解过程 ,第一步分解失重虽小 ,但放热量很大 ,说明分子结构发生重大变化。

Abstract:

The thermal behavior of either bulk-crystallized solid or super-cooled liquid of bonding agent 1,1’-(1,3-phenylenedlcarbonyl) bis-2-methyl-aziridine(HX-752)was investigated by DSC and TG-DTG. No physics and chemistry changes were found in the range of -80 ℃～100 ℃ except that the super-cooled liquid transform to the glass at -37.6 ℃ and the crystallized solid melt at 36 8 ℃～42 9 ℃.The decomposition heat for metastable super-cooled liquid is greater than that of crystallized solid. It is shown that thermal decomposition process of HX-752 is complicated although the mass-loss is relatively small, the release heat is great at the first step. It indicates that significant changes in the molecular constitution on the decomposition is happened.