摘要
研究了以齐聚异成二烯双锂为引发剂．以环已烷为溶剂的苯乙烯阴离子聚合的动力学．研究结果表明：齐聚异成二烯双锂的引发活性低于正丁基锂；增长反应对单体浓度为一次方关系．引发剂浓度仍服从与单锂体系类似的非近似动力学方程：由该式分别求出ｋ，＝５．８６×１０１２‘ｅｘｐ（），ｋａｐ＝７．１１×１０３ｅｘｐ（），根据上述结果．提出了用链端二缔合态和游离态来代替过去的二缔合体和单量体的概念．
A study of the kinetics of the initiation and propagation reactions in the polymerization of styrene by α,ω-oligomeric isoprene dilithium in cyclohexane has been made. The initiation reactivity has been shown to be lower than that or n-Buli.The propagation is first order with respect to styrene,the initiator concentration obeys the following The activation energies of the kp and kap have been shown to be 65.0 kJ/mol and 19.5 kJ/mol respectively,the dissociation energy to be 91.2 kJ/mol.In line with the above results, the authors put forward a new concept to substitute that of the dimer and monomer of the molecalar active chain for the dissociation state and free state of the active chain ends.
