本文应用氘醇淬灭法测定了钕化合物-烷基铝-丁二烯聚合体系的活性中心浓度.对五种钕化合物和三种烷基铝所组成的不同催化剂体系进行测定的结果表明:其活性中心浓度在0.004～0.08mol/molNd内变化.本文还研究了聚合条件及催化剂组成对活性中心浓度及增长速度常数的影响.结果表明:增长速度常数不随烷基铝及钕化合物的种类而变化,因此,对于不同组成的催化剂,其聚合活性的差别主要在于活性中心浓度的变化. In this paper, the deuterium alcohol quenching method was used to determine the active center concentration of the neodymium compound-aluminum alkyl-butadiene polymerization system.The results of different catalyst systems consisting of five neodymium compounds and three aluminum alkyls show that: The concentration of active site varied from 0.004 to 0.08 mol / molNd.In addition, the effects of polymerization conditions and catalyst composition on the concentration of active sites and the growth rate constant were also studied.The results show that the growth rate constant does not change with the kind of Al-Al and Neodymium compounds , Therefore, for the different composition of the catalyst, the polymerization activity of the main difference lies in the concentration of active center.