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以乙醚(Et_2O)作为正丁基锂-丁二烯-环己烷体系的极性添加剂,调节聚丁二烯的1,2-结构含量(B_o),对金关泰等提出的反应机理和B_v～[THF](THF为四氢呋喃)定量关系式进行验证。结果表明,对于Et_2O添加剂体系,当[Et_2O]>0.011mol/1时,符合上述关系式;当[Et_2O]<0.011mol/1时,略有偏离。由符合的部分,求出了综合平衡常数K′=4.52×10~(-3e~(3560/RT))(1/mol)~n,以及不同温度下的络合溶剂化指数n值。对较高温度(大于Et_2O沸点温度)的聚合体系进行考察,发现与定量关系式符合。
The ether (Et_2O) was used as the polar additive in n-butyllithium-butadiene-cyclohexane system to adjust the content of 1,2-polybutadiene (B_o). The reaction mechanism proposed by Jin Guantai et al. [THF] (THF is tetrahydrofuran) quantitative relationship to verify. The results show that for Et_2O additive system, [Et_2O]> 0.011mol / 1, the above relationship is satisfied; when [Et_2O] is less than 0.011mol / 1, it deviates slightly. The complex equilibrium constants K ’= 4.52 × 10 ~ (-3e ~ (3560 / RT)) (1 / mol) ~ n and the complex solvation index n at different temperatures were obtained from the corresponding parts. The higher temperature (greater than the boiling point of Et 2 O) polymerization system were investigated and found to be consistent with the quantitative relationship.