Solvent Effect on the Radical Copolymerizability of Styrene with p-Substituted Methyl Cinnamates
Solvent Effect on the Radical Copolymerizability of Styrene with p-Substituted Methyl Cinnamates
复制标题
溶剂对苯乙烯与对位取代肉桂酸甲酯自由基共聚性的影响
DOI：
10.1080/00222338308069443
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
T. Maeshima
中科院分区：
文献类型：
--
作者：
J. Asakura;M. Yoshihara;H. Fujihara;Y. Matsubara;T. Maeshima
摘要在苯、乙腈和乙酸中，对取代肉桂酸甲酯在60和80℃下进行了苯乙烯与对取代肉桂酸甲酯的自由基共聚合。用修正的哈米特方程将log 1/r1的值与a的值作对比，得到的p值按苯、乙腈和乙酸的顺序递减。估计了共聚反应的活化能和熵。讨论了基态和过渡态之间不同程度的溶剂化。
Abstract The radical co polymerization of styrene with p-substituted methyl cinnamates was carried out in benzene, acetonitrile, and acetic acid at 60 and 80°C. The p values obtained by plotting the values of log 1/r1 against a values with the modified Hammett's equation decreased in the order benzene, acetonitrile, and acetic acid. The activation energy and entropy in copolymerization were also estimated. The results are discussed in terms of the different degrees of solvation between the ground state and the transition state.