热响应性甲基丙烯酸寡聚（乙二醇）酯无规共聚物的自组装行为
Self-Assembly Behavior of Thermoresponsive Oligo(ethylene glycol) Methacrylates Random Copolymer.
作者信息
Peng Baoliang, Grishkewich Nathan, Yao Zhaoling, Han Xia, Liu Honglai, Tam Kam C
机构信息
Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2L 3G1.
Department of Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China.
出版信息
ACS Macro Lett. 2012 May 15;1(5):632-635. doi: 10.1021/mz300135x. Epub 2012 Apr 24.
A well-defined random copolymer containing 2-(2-methoxyethoxy) ethyl methacrylate (MEOMA, = 188 g/mol) and poly(ethylene glycol) methyl ether methacrylate (PEGMA, = 2080 g/mol) (poly(MEOMA--PEGMA)), = 17300 g/mol) was synthesized using the atom transfer radical polymerization (ATRP) process, and its thermoresponsive behaviors in aqueous solution were investigated. In comparison to other temperature-sensitive random copolymers based on oligo(ethylene glycol) methacrylates, this copolymer exhibited an unusual thermally induced two-stage aggregation process. The copolymer chains associate at the first thermal transition followed by a rearrangement process at the second thermal transition to produce a stable core-shell micellar structure. The morphology of the micelle comprises of a methacrylate core stabilized by the longer ethylene glycol segments ( = 2080 g/mol) shell.
通过原子转移自由基聚合（ATRP）过程合成了一种定义明确的无规共聚物，其包含甲基丙烯酸2-(2-甲氧基乙氧基)乙酯（MEOMA， = 188 g/mol）和聚（乙二醇）甲基醚甲基丙烯酸酯（PEGMA， = 2080 g/mol）（聚（MEOMA-PEGMA）， = 17300 g/mol），并研究了其在水溶液中的热响应行为。与其他基于甲基丙烯酸寡聚（乙二醇）酯的温度敏感无规共聚物相比，该共聚物表现出不同寻常的热诱导两阶段聚集过程。共聚物链在第一次热转变时缔合，随后在第二次热转变时发生重排过程以产生稳定的核壳胶束结构。胶束的形态由较长的乙二醇链段（ = 2080 g/mol）壳层稳定的甲基丙烯酸酯核组成。
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