| 反相悬浮淀粉接枝共聚微球反应的动力学 |
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| 引用本文： | 杨黎燕,赵新法,李仲谨,范涛.反相悬浮淀粉接枝共聚微球反应的动力学[J].高分子材料科学与工程,2011(5):67-70,74. |
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| 作者姓名： | 杨黎燕 赵新法 李仲谨 范涛 |
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| 作者单位： | 西安医学院药学院;陕西能源职业技术学院地质测量系;陕西科技大学化学与化工学院 |
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| 基金项目： | 陕西省教育厅自然科学基金资助项目(11JK0694);西安医学院校级基金项目(10FC021) |
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| 摘 要： | 以K<,2>S<,2>O<,8>-Na<,2>SO<,3>氧化还原体系为引发剂,研究了可溶性淀粉与N,N'-亚甲基双丙烯酰胺在反相悬浮体系中的接校共聚动力学.考察了引发剂、交联剂、淀粉、分散剂浓度和反应温度对聚合速率的影响规律.结果表明,在实验考察范围内的动力学关系式为R<,p>ocI]<'0.89>M]<'1.4...
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| 关 键 词： | 交联淀粉微球 动力学 反相悬浮聚合 聚合速率 |
Kinetics of Starch Graft Copolymer Microspheres in Inverse Suspension Polymerization System |
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| Liyan Yang,Xinfa Zhao,Zhongjin Li,Tao Fan.Kinetics of Starch Graft Copolymer Microspheres in Inverse Suspension Polymerization System[J].Polymer Materials Science & Engineering,2011(5):67-70,74. |
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| Authors: | Liyan Yang Xinfa Zhao Zhongjin Li Tao Fan |
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| Affiliation: | 1.College of Phamacy,Xi’an Medical College,Xi’an 710021,China;2.College of Chemistry and Chemical Engineering,Shaanxi University of Science & Technology,Xi’an 710021,China;3.Department of Geology Topography,Shaanxi Energy Institute,Xianyang 712000,China) |
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| Abstract: | The kinetics of graft copolymer of starch and N,N’-methylene-bis-acrylamide in inverse suspension polymerization system was investigated with K2S2O8Na2SO3 as the initiator,The rate orders of graft copolymerization with respect to the concentration of initiator,monomer,starch,dispersant were determined.The effect of the concentration of the individual components in the polymerization system on conversion was investigated.The results show that the dependence of the polymerization rate on the concentration of components in the polymerization system can be expressed for all four components by the following equation: Rp∝I]0.89M]1.450.730.70. In the polymerization process,termination of bimolecular chain and unimolecular chain exists at the same time.The concentration of monomer has greater effect on polymerization rate Rp.The overall activation energy for the polymerization is 46.5 kJ/mol at 30 ℃～50 ℃.Some aspects of the polymerization mechanism were discussed by the experimental results. |
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| Keywords: | crosslinked starch microspheres kinetics suspension polymerization polymerization rate |
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