| 过硫酸铵-亚硫酸氢钠引发淀粉与丙烯酸接枝共聚的反应动力学 |
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| 引用本文： | 吴岳英,张东平,邓慧红.过硫酸铵-亚硫酸氢钠引发淀粉与丙烯酸接枝共聚的反应动力学[J].上海大学学报(自然科学版),2004,10(3):302-305. |
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| 作者姓名： | 吴岳英 张东平 邓慧红 |
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| 作者单位： | 上海大学,环境与化学工程学院,上海,200072 |
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| 基金项目： | 上海市教委科技发展基金 (99A1 9)资助项目 |
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| 摘 要： | 该文研究了以过硫酸铵-亚硫酸氢钠为引发剂，玉米淀粉与丙烯酸的接枝共聚反应动力学．分别通过实验考察了淀粉浓度、单体浓度、引发剂浓度对接枝速率的影响，得到了实验条件下的反应速率表达式Rg=k0 exp(一Ea／RT)AA]^1.00StOH]^0.45S2O8^2-]^0．47HSO3^-]^0．47，并测定出反应过程的表观活化能Ea=17．76kJ／mol．根据前人提出的反应机理，导出了接枝反应速率方程式．理论计算与上述实验结果基本符合．
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| 关 键 词： | 过硫酸铵-亚硫酸氢钠 玉米淀粉 丙烯酸 反应动力学 反应活化能 |
| 文章编号： | 1007-2861(2004)03-0302-04 |
| 修稿时间： | 2003年4月5日 |
Kinetics of Graft Copolymerization of Acrylic Acid onto Maize Starch by Ammonium Persulfate-Sodium Bisulfate as Initiator |
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| WU Yue-ying,ZHANG Dong-ping,DENG Hui-hong.Kinetics of Graft Copolymerization of Acrylic Acid onto Maize Starch by Ammonium Persulfate-Sodium Bisulfate as Initiator[J].Journal of Shanghai University(Natural Science),2004,10(3):302-305. |
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| Authors: | WU Yue-ying ZHANG Dong-ping DENG Hui-hong |
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| Abstract: | Kinetics of graft copolymerization of acrylic acid onto maize starch using ammonium persulfate-sodium bisulfate as initiator is studied. The effects on the rate of grafting such as concentration of initiator, monomer and starch as well as temperature are investigated. The experimental rate of grafting is expressed as R_g=k_0 exp(-E_a/RT)AA]~(1.00)StOH]~(0.45)S_2O_8~(2-)]~(0.47)HSO_3~-]~(0.47), and the activation energy is found to be 17.76 kJ/mol. The mechanism is discussed. An equation of the grafting rate is derived, which fits the experimental results satisfactorily. |
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| Keywords: | ammonium persulfate-sodium bisulfate maize starch acrylic acid kinetics activation (energy) |
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