高等规度聚丙烯腈的合成  

Synthesis of highly isotactic polyacrylonitrile

作　　者：徐晶[1] 许志献[1] 代永强[1] 徐樑华[1] 金日光[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2007年第6期608-611,共4页Journal of Beijing University of Chemical Technology(Natural Science Edition)

摘　　要：研究了在不同的反应条件下二丁基镁引发的丙烯腈阴离子聚合反应,得到了等规度较高的聚丙烯腈(PAN),通过对碳的核磁谱图(13C-NMR)分析得出聚合产物中三单元组全同立构、间同立构及无规立构的含量,三单元组等规立构的质量分数可以达到56.49%。将二丁基镁引发的PAN等规立构含量与偶氮二异丁氰(AIBN)引发的自由基聚合得到的PAN等规立构含量进行了比较,通过示差扫描量热分析(DSC)测试,结果表明等规度较高的PAN在预氧化过程中放热量大,易于氧化成环。The anionic polymerization of acrylonitrile （AN） initiated by dibutylmagnesium has been investigated using different reaction conditions and the triad tacticities of the resulting polyacrylonitrile （PAN） were analyzed by ^13C-NMR spectroscopy. Relatively highly isotactic polyacrylonitrile samples were obtained, with the maximum isotactic triad content being 56.49 %. The polyacrylonitrile samples were compared with that obtained by free-radical polymerization of AN using AIBN as initiator. Differential scanning calorimeter （DSC） showed that the highly isotactic polyacrylonitrile releases more heat during the pre-oxidatiion step which promotes the subsequent cyclization process.

关 键 词：聚丙烯腈(PAN) 等规立构 二丁基镁 

分 类 号：TQ050.425[化学工程]