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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (24): 2609-2614. 上一篇    下一篇

研究论文

以偶氮二异庚腈为引发剂的丙烯腈的低温溶液共聚合

王麒1，张森*,2，陈惠芳1，潘鼎*,1   

  1. (1高性能纤维及制品教育部重点实验室(B) 东华大学材料科学与工程学院 上海 201620)
    (2中国科学院上海有机化学研究所有机氟化学重点实验室 上海 200032)
  • 投稿日期:2010-10-29 修回日期:2010-11-22 发布日期:2010-11-22
  • 通讯作者: 潘鼎 E-mail:dingpan@dhu.edu.cn

Solution Copolymerization of Acrylonitrile Initiated by 2,2 - Azobis(2,4-dimethylvaleronitrile) at Low Temperature

Wang Qi1 Zhang Sen*,2 Chen Huifang1 Pan Ding*,1   

  1. (1 The Key Laboratory of High-Performance Fiber and Product (B), Ministry of Education, College of Material Science & Engineering, Donghua University, Shanghai 201620)
    (2 Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032)
  • Received:2010-10-29 Revised:2010-11-22 Published:2010-11-22

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2306

被引次数

16

以偶氮二异庚腈为引发剂, 丙烯腈、衣康酸和丙烯酸甲酯为三元共聚体系, 在二甲基亚砜中进行低温溶液共聚合, 合成了高分子量的聚丙烯腈树脂. 通过正交设计的方法研究了反应温度、单体浓度和引发剂浓度等因素对分子量和单体转化率的影响, 得出了相应的最佳工艺配方. 采用红外光谱、核磁共振和凝胶渗透色谱等方法对共聚物进行了表征. 结果表明, 降低聚合反应温度和引发剂的用量以及提高单体浓度均有利于提高共聚物的分子量, 其中引发剂浓度对分子量的影响最为显著.

关键词: 丙烯腈, 偶氮二异庚腈, 低温溶液共聚合

Polyacrylonitrile resins with high molecular weight were obtained by ternary copolymerization of acrylonitrile, itaconic acid and methyl acrylate in dimethyl sulfoxide at low temperature using 2,2 -azobis(2,4-dimethylvaleronitrile) as initiator. Orthogonal design method was employed to investigate the effect of the polymerization temperature, the concentrations of the initiator and the comonomers on the molecular weight and the conversions of the comonomers, and thus the optimized formula was achieved. The copolymer was characterized by FT-IR, NMR and GPC. The results showed that the low polymerization temperature and feeding of the initiator and the high concentration of the comonomers would all benefit in increasing the molecular weight of the copolymer, and the concentration of the initiator is the most important factor to influence the molecular weight of the copolymer.

Key words: acrylonitrile, 2,2 -azobis(2,4-dimethylvaleronitrile), low-temperature solution copolymerization