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活性聚合是连锁聚合反应体系中链转移和终止反应速率为零时的特殊反应类型，表现活性聚合和准活性聚合则是链转移或终止反应未被完全消除而又具有活性聚合特征的两类聚合反应，是非活性聚合向活性聚合过渡和逼近时的两种聚合反应类型。本文对活性聚合、表观活性聚合和准活性聚合的基本概念及它们之间的区别作了简单的介绍。
Reactive polymerization is a special type of reaction when the rate of chain transfer and termination of reaction in a chain polymerization system is zero. The two types of polymerization, ie, active polymerization and quasi-living polymerization, are characterized by chain transfer or termination reaction which is not completely eliminated The reaction is the type of two polymerization reactions that occur when the inactive polymerization transitions to and approximates the living polymerization. In this paper, the basic concepts of living polymerization, apparent living polymerization and quasi-living polymerization and their differences are briefly introduced.