中文摘要：

以过硫酸钾（K2S2O8）／硫代硫酸钠（Na2S2O3）氧化还原体系为引发剂，以三乙醇胺（TEA）为添加剂，在氧气存在条件下，进行了N-异丙基丙烯酰胺（NIPAM）的水相可逆加成-断裂-链转移自由基聚合（RAFT聚合）．实验结果表明，聚合物分子量随转化率线性增长，分子量分布窄（Mw／Mn≤1．10），ln（[M]0／[M]）对时间成线性关系，符合一级动力学特征．扩链聚合反应表明，聚合物的分子量随之会继续线性增大．在25-35℃范围内，聚合速率随温度的升高而增加．研究结果表明，聚合反应呈现活性特征，而且在室温和有氧条件下能以较快的反应速度进行．

英文摘要：

RAFT polymerization of N-isopropylacrylamide （NIPAM） in aqueous solution at room-temperature in the presence of oxygen was conducted by using K2S2O8/Na2S2O3 redox initiator and triethanolamine （TEA） as the additive. The polymers obtained were characterized by GPC. The molecular weight of the polymer linearly increases with the conversion and molecular weight distribution is narrow （Mw/Mn≤1. 0）. The linear time dependence of ln（[M]0/[M]） indicates a first order polymerization. Moreover, the chain extension polymerization demonstrated that the molecular weight of the macro-chain transfer agents linearly increases with monomer conversion. All the facts indicate that the polymerization exhibits living characteristics. Moreover, the polymerization rate increases with temperature in the range of 25-35℃. And the polymerization can be performed at a relatively high rate at room-temperature and in the presence of oxygen.