聚醚砜酮薄膜热稳定性及热解动力学规律的研究  

An investigation of the thermal stability and pyrolysis kinetics of poly(phthalazinone ether sulfone ketone) film

作　　者：刘诗丽[1] 王同华[1] 张兵[1] 

机构地区：[1]大连理工大学化工学院材料化工系炭素研究室大连理工大学膜科学与技术研究开发中心,辽宁大连116012

出　　处：《新型炭材料》2004年第3期224-228,共5页New Carbon Materials

基　　金：国家自然科学基金(20276008) ~~

摘　　要：　采用热重分析法对聚醚砜酮(PPESK)薄膜在氮气氛下的热分解反应进行了研究,结果表明,热分解反应最剧烈的温度区间在400℃～600℃之间,这也是热解炭化阶段的关键温度区间;温度高于600℃分解反应趋于缓和。动力学研究得出,PPESK分解过程为一级反应;以Kissinger最大失重速率法求得表观活化能为211.35kJ mol;以Ozawa等失重百分率法求得10%～30%的失重率下反应表观活化能在152.31kJ mol～274.43kJ mol之间,频率因子lnA值在21.98min-1～38.75min-1之间,充分表明PPESK热稳定性很高,这也为炭化过程提供了重要动力学参数。The pyrolysis of a poly( phthalazinone ether sulfone ketone) (PPESK) film in N-2 atmosphere was investigated by thermogravimetric analysis. Results show that the thermal stability of the PPESK film is very high. The thermal degradation of PPESK film is very violent in the temperature range 400 similar to 600 degreesC which is a crucial temperature zone for pyrolytic carbonization. The reaction is first order. The dynamic data analyzed using the Kissinger peak maximum technique give an apparent global activation energy, E of 211.35 kJ/mol. When the isoconversion procedure developed by Ozawa is used, E is increased from 152.31 kJ/mol to 274.43 kJ/mol with an increase of the conversion from 10 % to 30 % and the frequency factor LnA is increased from 21.98 to 38.75 min(-1).

关 键 词：聚醚砜酮 热稳定性 炭化过程 热解动力学 表观活化能 热分解反应 薄膜 区间 氮气氛 一级反应 

分 类 号：TB383[一般工业技术—材料科学与工程]