高分辨裂解气相色谱－质谱研究聚吡咙的热分解  

STUDY ON THERMAL DEGRADATION OF POLYBENZIMIDAZOPYRROLONES BY HR PVGC-MS

作　　者：蒋钟 金熹高[1] 高雪松[1] 周文乐[1] 卢凤才[1] 罗远芳[1] 

机构地区：[1]中国科学院化学研究所,华南理工大学高分子系

出　　处：《高分子材料科学与工程》1996年第4期67-71,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金;中国科学院高分子物理联合开放实验室资助

摘　　要：用高分辨裂解气相色谱－质谱考察了不同聚吡咙的热分解，分析了其热分解产物的组成、分布和归属，研究了其环化过程以及该过程对热分解的影响，进而详细阐述了聚吡咙的热分解机理。The thermal degradation of several polybenzimidazopyrrolones(polypyrrolones)was qualitatively and quantitatively investigated by HR PyGC-MS. Morethan 15 charcicteristic pyrolysates reflecting the step-ladder polymers were identified by on -line GC-MS. The polypyrrolones, as high heat-resistance polymers. show significantly low pyrolysate yields ( 20%￣30%) even up to 950℃ under the pyrolysis conditions reported in this work.Therefore, the pyrolysis mechanism of polypyrrolones invovies thermal breakdowns of the carbon-nitrigen bonds and partial carbon-oxygen bonds separating two ladders are proposed. Furthermore, the effect of cyclization on the thermal degradation of the polymers is discussed.

关 键 词：聚吡咙 热分解 环化 气相色谱 质谱 

分 类 号：O633.5[理学—高分子化学]