Abstract The reversible addition fragmentation chain transfer (RAFT) polymerization method was adopted here to prepare a series of thermo-sensitive copolymers, poly (N,N-diethyl- acrylamide-b-N-vinylpyrrolidone). Their structures, molecular weight distribution and temperature sensitivity performances were characterized by the nuclear magnetic resonance (1HNMR), the gel permeation chromatography (GPC) and the fluorescence spectrophotometer, respectively. It has been identified that the synthesis reaction of the block copolymer was living polymerization. The thermo-sensitivity study suggested that N-vinylpyrrolidone (NVP), played a key role on the lower critical solution temperature (LCST) performance.

中文翻译：

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热敏聚(N-乙烯基吡咯烷酮-b-N,N-二乙基丙烯酰胺)的设计与合成研究

摘要 采用可逆加成断裂链转移(RAFT)聚合方法制备了一系列热敏性共聚物聚(N,N-二乙基丙烯酰胺-bN-乙烯基吡咯烷酮)。分别通过核磁共振(1HNMR)、凝胶渗透色谱(GPC)和荧光分光光度计对其结构、分子量分布和温度敏感性性能进行了表征。经鉴定，该嵌段共聚物的合成反应为活性聚合反应。热敏性研究表明，N-乙烯基吡咯烷酮 (NVP) 在降低临界溶解温度 (LCST) 性能方面发挥着关键作用。