用正丁基锂、二乙烯基苯和异戊二烯合成了可溶于非极性溶剂的多锂引发剂体系,用其制备了苯乙烯-丁二烯-异戊二烯三元共聚橡胶,研究了温度、N,N,N’,N’-四甲基乙二胺(TMEDA)/Li+(摩尔比,下同)及引发剂浓度对其反应动力学的影响。结果表明,随着温度的升高、TMEDA用量的增加(此时TMEDA/Li+不大于1)、引发剂浓度的增加,各种单体的反应速率增加;在同一条件下,单体的表观增长反应速率常数由大到小依次为丁二烯、苯乙烯、异戊二烯。 A multi-lithium initiator system soluble in nonpolar solvent was synthesized by using n-butyllithium, divinylbenzene and isoprene, and styrene-butadiene-isoprene terpolymer rubber The effects of temperature, N, N, N ’, N’-tetramethylethylenediamine (TMEDA) / Li + molar ratio and initiator concentration on the reaction kinetics were studied. The results showed that with the increase of temperature, the amount of TMEDA increased (at this time TMEDA / Li + no more than 1), the initiator concentration increased, the reaction rate of various monomers increased; under the same conditions, the apparent monomer The increasing reaction rate constants were as follows: butadiene, styrene, isoprene.