中华医学超声杂志

应用化学 ›› 2011, Vol. 28 ›› Issue (12): 1354-1359.DOI: 10.3724/SP.J.1095.2011.00027

• 研究论文 • 上一篇    下一篇

丙烯酰胺与二甲基二烯丙基氯化铵共聚动力学

毕可臻,张跃军*   

  1. (南京理工大学化工学院 南京 210094)
  • 收稿日期:2011-01-14 修回日期:2011-04-08 出版日期:2011-12-10 发布日期:2011-12-10
  • 通讯作者: 张跃军，教授; Tel/Fax:025-84315083; E-mail:zhyuejun@mail.njust.edu.cn; 研究方向：水溶性高分子、表面活性剂、含能材料合成、工艺、机理和应用
  • 作者简介:毕可臻(1980-)，男，山东威海人，南京理工大学博士生，E-mail: bkz0419@163.com，研究方向：水溶性高分子合成、工艺、机理和应用。
  • 基金资助:
    “十五”国家科技攻关项目（2003BA327C）

Kinetics Study on Polymerization of Acrylamide and Dimethyldiallylammonium Chloride

BI Kezhen, ZHANG Yuejun*   

  1. (School of Chemical Engineering,Nanjing University of Science & Technology,Nanjing 210094)
  • Received:2011-01-14 Revised:2011-04-08 Published:2011-12-10 Online:2011-12-10
  • Contact: Zhang Yuejun

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1656

被引次数

13 | 4

摘要：

采用膨胀计法研究了以过硫酸铵亚硫酸氢钠为引发剂，丙烯酰胺（AM）和二甲基二烯丙基氯化铵（DMDAAC）在水溶液中的共聚反应动力学，测定了相应的聚合表观活化能、聚合速率方程和单体竞聚率。 结果表明，当AM与DMDAAC摩尔比分别为5∶5、6∶4和7∶3时，表观活化能分别为Ea1=90.61 kJ/mol、Ea2=88.88 kJ/mol和Ea3=85.15 kJ/mol；聚合反应温度为45 ℃下，聚合速率方程分别为Rp1=kc(M)2.84c(IO)0.51·c(IR)0.61，Rp2=kc(M)2.77c(IO)0.51c(IR)0.59和Rp3=kc(M)2.73c(IO)0.50c(IR)0.56；2种单体的竞聚率分别为rAM=6.11，rDMDAAC=0.14。 上述实验结果可从动力学角度为不同阳离子度共聚物Poly(DMDAAC-co-AM)（PDA）聚合反应速率差别及产物特征黏度值差异进行解释。

关键词: 丙烯酰胺, 二甲基二烯丙基氯化铵, 聚合动力学, 聚合速率方程, 表观活化能, 竞聚率

Abstract:

The kinetics of polymerization of acrylamide(AM) and dimethyldiallylammonium chloride(DMDAAC) initiated by ammonium persulfate-sodium bisulfate redox complex in aqueous solution was studied. The polymerization rate equation was obtained, and the apparent activation energy and reactivity ratio were measured. The results show that when the polymerization temperature was 45 ℃, n(AM)∶n(DMDAAC) was 5∶5, 6∶4 and 7∶3, the polymerization rate equations were Rp1=kc(M)2.84c(IO)0.51c(IR)0.61, Rp2=kc(M)2.77c(IO)0.51c(IR)0.59 and Rp3=kc(M)2.73c(IO)0.50c(IR)0.56. The apparent activation energies were Ea1=90.61 kJ/mol, Ea2=88.88 kJ/mol and Ea3=85.15 kJ/mol, respectively, while the reactivity ratios of AM and DMDAAC were rAM=6.11, rDMDAAC=0.14. The kinetics results could explain the difference of copolymerization rate and intrinsic viscosity of poly(DMDAAC-co-AM)（PDA） with different cationicities.

Key words: acrylamide, dimethyldiallylammonium chloride, polymerization kinetics, polymerization rate equation, apparent activation energy, reactivity ratio

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