高等规度聚丙烯腈的合成

徐晶;许志献;代永强;徐华;金日光*

北京化工大学学报(自然科学版) ›› 2007, Vol. 34 ›› Issue (6) : 608-611.

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北京化工大学学报(自然科学版) ›› 2007, Vol. 34 ›› Issue (6) : 608-611.
材料科学与工程

高等规度聚丙烯腈的合成

  • 徐晶;许志献;代永强;徐华;金日光*
作者信息 +

Synthesis of highly isotactic polyacrylonitrile

  • XU Jing;XU ZhiXian;DAI YongQiang;XU LiangHua;JIN RiGuang*
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文章历史 +

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。

Abstract

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 by13C-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.

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徐晶;许志献;代永强;徐华;金日光*. 高等规度聚丙烯腈的合成[J]. 北京化工大学学报(自然科学版), 2007, 34(6): 608-611
XU Jing;XU ZhiXian;DAI YongQiang;XU LiangHua;JIN RiGuang*. Synthesis of highly isotactic polyacrylonitrile[J]. Journal of Beijing University of Chemical Technology, 2007, 34(6): 608-611

参考文献

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