温度场对PAN预氧纤维中类萘啶结构的影响  

Effect of temperature field on naphthyridine-like structure of PAN stabilized fibers

作　　者：赵纯[1] 高爱君[1] 王凯[1] 孔令强[1] 徐樑华[1] 

机构地区：[1]国家碳纤维工程技术研究中心,北京化工大学,北京100029

出　　处：《化工新型材料》2013年第1期57-60,共4页New Chemical Materials

基　　金：国家重点基础研究发展计划(2011CB605602)

摘　　要：采用固体13 C核磁共振(13 C Solid-NMR)、差示扫描量热分析(DSC)研究了不同温度场对聚丙烯腈纤维预氧过程中类萘啶结构生成的影响。研究结果表明:提高预氧化温度纤维中易于形成类萘啶的梯形含氮芳杂环结构,预氧化热处理温度高于230℃时,类萘啶结构生成速度较快。梯度升温方式影响类萘啶结构的生成,三温区温度场条件下(210-230-245℃),在高温区(245℃)停留时间较长时有利于类萘啶结构的形成和发展;四温区温度场中(210-230-245-260℃),均匀分配各温区的热处理时间更有利于类萘啶结构的生成。Abstract Polyacrylonitrile fiber was heated in air at temperatures ranging from 210 to 260℃. The effect of different temperature fields on the characteristic structure （naphthyriding-like） were studied by laC Soli＆NMR and DSC. The re- sults showed that the amount of naphthyriding-like structure was increased with increasing temperature. In the temperature field with three zones （210-230-245℃）,longer time at 245℃ was benefited for the formation of naphthyriding-like struc- tures. In the temperature field with four zones （210-230-245-260℃）, the same time at each temperature achieved the most naphthyriding-like structures.

关 键 词：聚丙烯腈纤维 预氧化 类萘啶结构 温度场 

分 类 号：TQ342.31[化学工程—化纤工业]