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本文采用膨胀计法研究了Mn(acac)_3、Co(acac)_3和Ni(acac)_2引发的苯乙烯聚合反应。研究了在各种络合物和单体浓度下的聚合反应速率,观察到R_p对[M]~(1.2)作图呈直线且通过原点;R_p对[络合物]~(1/2)作图亦呈直线。研究了在不同温度下的聚合反应速率,观察到logR_p对1/T作图呈直线。还研究了溶剂性质对聚合反应速率的影响,观察到聚合反应速率随着溶剂给电子能力的增强而增大。并提出了以四氢呋喃为溶剂的引发反应机理。
In this paper, the swelling polymerization was used to study the polymerization of styrene initiated by Mn (acac) _3, Co (acac) _3 and Ni (acac) _2. The rate of polymerization at various concentrations of complex and monomer was studied. The plot of Rp versus [M] ~ (1.2) Drawing also showed a straight line. The polymerization rates at different temperatures were investigated and logR_p was plotted linearly against 1 / T. The effect of solvent properties on the polymerization rate was also studied, and the rate of polymerization was observed to increase as the solvent’s ability to donate electrons increased. The mechanism of initiation reaction with tetrahydrofuran as solvent was also proposed.