文献类型：期刊文献

英文题名：Self-Assembly Behavior of Thermoresponsive Oligo(ethylene glycol) Methacrylates Random Copolymer

作者：Peng, Baoliang[1,2];Grishkewich, Nathan[2];Yao, Zhaoling[2];Han, Xia[1];Liu, Honglai[1];Tam, Kam C.[2]

机构：[1]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[2]Univ Waterloo, Dept Chem Engn, Waterloo Inst Nanotechnol, Waterloo, ON N2L 3G1, Canada

年份：2012

卷号：1

期号：5

起止页码：632

外文期刊名：ACS MACRO LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000303964900023)】；

基金：Baoliang Peng thanks the China Scholarship Council for supporting his research at the University of Waterloo, Canada. This work is supported by National Natural Science Foundation of China (No. 21176065), 111 Project of Ministry of Education of China (No. B08021), and the Fundamental Research Funds for the Central Universities of China. K. C. Tam wishes to acknowledge the funding from CFI and NSERC.

语种：英文

摘要：A well-defined random copolymer containing 2-(2-methoxyethoxy) ethyl methacrylate (MEO(2)MA, M-n = 188 g/mol) and poly(ethylene glycol) methyl ether methacrylate (PEGMA, M-n = 2080 g/mol) (poly(MEO(2)MA-co-PEGMA(2080))), M-n = 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 (M-n = 2080 g/mol) shell.