在一些离子型活性聚合反应体系中，存在两种具有链增长反应活性的物种，例如自由离子和离子对。
In several ionic living polymerization systems, there are two kinds of active species such as ion pairs and free ions, or contact ion pairs and solvent separated ion pairs.
以聚乙烯吡啶的化学反应制备了含正负离子对结构单元的两性聚合物CAPVP。
In this paper the chemical reaction of poly (vinyl pyridine) was studied and the polyelectrolytes CAPVP containing zwitterion structure units were synthesized.
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