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Yao Wei, Jin Guantai and Xu Ruiqing (Beijing Institute of Chemical Technology, Beijing)
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姚薇,金关泰,徐瑞清
Abstract: The relationship between the reactivity of the polymerization of a conjugated diene initiated by butyl lithium and the transition energy as solvent polarity parameter was studied. According to the experimental data, we derived some semiquantitative relationships as follows: where ΔH+Ex- Eσ is a complex activation energy of butadiene polymerization in cyclohexane in the presence of a Lewis base as polar additive. 2. Eapp = 74.04-1.756ET, E = 48.35- 1.107ET where Eapp and E are apparent and real activation energies of butadiene plymerization in different solvents respectively. 3. ΔH1,2-1,4 = 23.79-0.717ET where ΔH1, 2-1,4 is the difference of activation energies of 1,2-and 1,4-structures formed during butadiene polymerization in different solvents. 4. Eapp = 97.62-2.409ET where Eapp is the apparent activation energy of anionic polymerization of isoprene in different solvents.
摘要: 首次研究了以正丁基锂引发的共轭二烯烃在不同溶剂中聚合的反应活性与溶剂极性的经验参数E_T的关系,并导出了五个半定量关系式,由这些方程式可方便地预先估计在相应溶剂中的动力学和热力学常数.
Yao Wei, Jin Guantai and Xu Ruiqing (Beijing Institute of Chemical Technology, Beijing). Application of Transition Energy (E_T) as Solvent polarity Parameter in Anionic Polymerization of Conjugated Diene[J]. .
姚薇,金关泰,徐瑞清. 溶剂极性的经验参数E_T在共轭二烯烃阴离子聚合中的应用 [J]. CIESC Journal.
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