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首页> 外文期刊>Polimery >Syntheses,structures and properties of novel oligo(azomethine ether)s containing or not chlorine atoms in the main chain
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Syntheses,structures and properties of novel oligo(azomethine ether)s containing or not chlorine atoms in the main chain

机译：主链上含或不含氯原子的新型低聚（甲亚胺醚）的合成，结构和性能

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摘要

New oligoazomethines were synthesized via polycondensation of aromatic diamines with one of two dialdehydes.Both dialdehydes,namely 4-({2-[(4-formylphenoxy)methyl]ben-zyl}oxy)benzaldehyde(2-FPMBB),and 4-({4-[(4-formylphenoxy)methyl]benzyl)oxy)benzaldehyde(4-FPMBB)were prepared from p-hydroxybenzaldehyde with o-xylenedibromide or p-xylenedi-bromide,respectively.Dialdehydes and oligomers were characterized by FT-IR,~1H NMR and ~(13)C NMR methods.Size exclusion chromatography(SEC)technique was used to determine molecular weights and molecular weight distributions of synthesized oligomers.The thermal stability of oligomers was conducted by thermogravimetric analysis(TGA)and differential thermal analysis(DTA).The weight losses of oligoazomethines(01,02,03 and 04)at 1000 °C were found to be 54.74,46.27,54.85 and 53.10 % respectively.In all cases,the imine(-HC=N-)linkage is the first breaking group due to the high temperature.It can be seen from TGA that oligo(azomethine ether)s containing chlorine atoms have higher thermal stability at 1000 °C than 01 and 03 oligomers.
机译：通过芳族二胺与两个二醛之一的缩聚反应合成了新的低聚甲亚氨酸。这两个二醛分别为4-（{2-[（（4-formylphenoxy）methyl] ben-zyl} oxy）苯甲醛（2-FPMBB）和4-（由对羟基苯甲醛与邻二甲苯二溴化物或对二甲苯二溴化物分别制得{4-[（4-甲酰基苯氧基）甲基]苄基]氧基]苯甲醛（4-FPMBB）。用FT-IR对二醛和低聚物进行了表征， 〜1H NMR和〜（13）C NMR方法。使用尺寸排阻色谱（SEC）技术确定合成的低聚物的分子量和分子量分布。低聚物的热稳定性通过热重分析（TGA）和差热分析进行发现低聚甲亚胺（01,02,03和04）在1000°C时的失重分别为54.74、46.27、54.85和53.10％。在所有情况下，亚胺（-HC = N-）键是由于高温导致的第一个断裂基团。从TGA中可以看出，含ch的低聚（甲亚胺醚） rine原子在1000°C时具有比01和03低聚物更高的热稳定性。

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