| 位阻效应对引发-转移-终止剂引发和控制活性自由基聚合的影响 |
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| 引用本文： | 刘洪波.位阻效应对引发-转移-终止剂引发和控制活性自由基聚合的影响[J].顺德职业技术学院学报,2010,8(1):7-9. |
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| 作者姓名： | 刘洪波 |
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| 作者单位： | 顺德职业技术学院,医学系,广东,佛山,528333 |
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| 摘 要： | 研究了碳-碳引发转移终止剂（iniferter）对甲基丙烯酸甲酯聚合反应的影响，实验结果表明：引发剂取代基位阻效应的增大将降低初级自由基与单体的加成反应速率，进而降低聚合反应速度：位阻效应的增加尽管也同时降低了初级自由基与增长自由基的偶合反应速率，但也使聚合物末端的活性端基更容易均裂，从而能够使体系中保持较高的初级自由基浓度，更有利于对聚合反应的控制。
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| 关 键 词： | 位阻效应 引发转移终止剂 活性自由基聚合 |
The Effect of Steric Hindrance of Substituted Group of Iniferter on Initiation and Polymerization of MMA |
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| Authors: | LIU Hong-bo |
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| Institution: | LIU Hong-bo (Department of Medicine Science,Shunde Polytechnic,Foshan Guangdong 528333,China) |
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| Abstract: | The increase of steric hindrance of substituted group in carbon-carbon iniferter causes the decrease of reaction rate between monomer and elementary free radical,and further the polymerization rate.With the increase of steric hindrance,the living end group of polymer obtained by this method is more homo-pyrolysised,and the higher concentration of elementary free radical in polymerization system is more advantageous for the control of polymerization. |
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| Keywords: | steric hindrance initiation-transfer agent-termination (iniferter) living radical polymerization |
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