| 纳米TiO_2表面的原位接枝聚合动力学 |
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| 引用本文： | 张蕾,赵中原,刘娜,张国林,吴秋华,关宏宇,金燕利.纳米TiO_2表面的原位接枝聚合动力学[J].高分子材料科学与工程,2010(4):33-35,39. |
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| 作者姓名： | 张蕾 赵中原 刘娜 张国林 吴秋华 关宏宇 金燕利 |
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| 作者单位： | 辽宁大学化学学院;海军装备部驻沈阳军事代表局; |
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| 基金项目： | 辽宁省教育厅科技创新团队项目(2007T053) |
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| 摘 要： | 以甲苯为溶剂,偶氮二异丁腈(AIBN)为引发剂,在纳米TiO2表面引发甲基丙烯酸丁酯(BMA)单体的聚合反应,通过红外光谱(FT-IR)、热重(TG)分析表明,纳米TiO2表面已接枝聚合上有机分子链。研究了改性后的纳米TiO2表面发生原位接枝聚合反应的动力学行为,考察了聚合反应温度、单体浓度、引发剂浓度、纳米TiO2用量等因素对聚合反应速率的影响,测定了反应级数和聚合反应的活化能。结果表明,其聚合速率方程为:Rp=kBMA]1.00AIBN]0.86mTiO2]0.76,聚合反应的表观活化能Ea为135.94kJ/mol。探讨了聚合反应机理,其聚合反应机理与自由基聚合反应机理相符合,链终止反应为单基终止与双基终止并存。
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| 关 键 词： | 纳米TiO2 甲基丙烯酸丁酯 接枝聚合 表观动力学 |
Kinetics of In-Situ Grafted polymerization onto the Surface of Nano-TiO_2 |
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| ZHANG Lei,ZHAO Zhong-yuan,LIU Na,ZHANG Guo-lin,WU Qiu-hua,GUAN Hong-yu,JIN Yan-li.Kinetics of In-Situ Grafted polymerization onto the Surface of Nano-TiO_2[J].Polymer Materials Science & Engineering,2010(4):33-35,39. |
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| Authors: | ZHANG Lei ZHAO Zhong-yuan LIU Na ZHANG Guo-lin WU Qiu-hua GUAN Hong-yu JIN Yan-li |
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| Affiliation: | 1. College of Chemistry;Liaoning University;Shenyang 110036;China;2. Navy Equipment Department Military Representative Bureau in Shenyang;Shenyang 110034;China |
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| Abstract: | Then in-situ grafted polymerization was carried out between the functionalzed particles and butyl methacrylate monomer (BMA) under the action of initiating agent to accomplish the surface modification of nano-TiO2. The analysis of infrared spectrum(FT-IR) and thermogravimetry(TG) indicated that new organic chains were introduced onto the surface of nano-TiO2. Moreover,the effects of concentrations of BMA,2,2'-azo-bis-isobutyronitrile(AIBN),nano-TiO2 and the temperature on the polymerization rate were studie... |
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| Keywords: | nano-TiO2 butyl-methacrylate graft polymerization apparent kinetics |
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