Zishan Li, Jing Lyu, Yinghao Li, Rijian Song, Chunyu Zhao, Melissa Johnson, Tianyu Mao, Hongyun Tai, Wenxin Wang
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引用次数: 0
摘要
以聚乙二醇二丙烯酸酯(PEGDA)为原料(Mn分别为575和700 g mol-1),通过增强分子内环化反应,成功地合成了一系列水溶性peg基单链环化/打结聚合物。双丙烯酸酯大分子的均聚首先通过线性传播进行,然后是自环化。在高单体与引发剂比(例如,100-500)和室温下,可以在不凝胶化的情况下获得高达70%的高环化比的环化聚合物。值得注意的是,环化聚(PEGDA575)在水溶液中表现出浓度依赖的热响应特性。
Water Soluble Thermoresponsive Single-Chain Cyclized/Knotted Polymers from Intramolecular Cyclization Dominated Homopolymerization of PEG Diacrylate
A series of water-soluble, PEG-based single-chain cyclized/knotted polymers are successfully synthesized through the homopolymerization of poly(ethylene glycol) diacrylate (PEGDA) (Mn = 575 and 700 g mol−1, respectively) via enhanced intramolecular cyclization. The homopolymerization of the diacrylate macromers first proceeds through linear propagation, followed by self-cyclization. Under high monomer-to-initiator ratios (e.g., 100–500) and room temperature, cyclized polymers with high cyclized ratios of up to 70% are achieved without gelation. Notably, the cyclized poly(PEGDA575) exhibits concentration-dependent thermoresponsive properties in aqueous solutions.
期刊介绍:
Macromolecular Rapid Communications publishes original research in polymer science, ranging from chemistry and physics of polymers to polymers in materials science and life sciences.