本文研究了一种新的烯烃聚合活性中心浓度测定方法,即CO阻聚法,并在此基础上测定了络合型催化剂丙烯气相聚合的活性中心浓度、链增长速度常数及活化能;证实了该方法用于丙烯气相聚合的可靠性及其主要影响因素是CO对活性中心的“多次阻聚”,同时从实验上证明丙烯聚合速度衰减是由于活性中心浓度降低。 In this paper, a new method for the determination of the concentration of active center of olefin polymerization, that is, the CO polymerization method was studied, and the active center concentration, chain growth rate constant and activation energy of the gas phase polymerization of the complex catalyst were determined. The reliability of this method for gas-phase polymerization of propylene and its main influence factor is the “multiple inhibition” of CO on the active site. At the same time, it was experimentally proved that the degradation of propylene polymerization rate was due to the decrease of the active site concentration.