Water-Soluble, Thermoresponsive, Hyperbranched Copolymers Based on PEG-Methacrylates: Synthesis, Characterization, and LCST Behavior
Water-Soluble, Thermoresponsive, Hyperbranched Copolymers Based on PEG-Methacrylates: Synthesis, Characterization, and LCST Behavior
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DOI：
10.1002/pola.24027
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发表时间：
2010-07-01
影响因子：
--
通讯作者：
Davis, Thomas P.
中科院分区：
文献类型：
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作者：
Luzon, Mario;Boyer, Cyrille;Davis, Thomas P.
以二甲基丙烯酸乙二醇酯（EGD-MA）为交联剂，通过可逆加成-断裂链转移聚合法，将甲基丙烯酸二乙二醇酯（DEGMA）与甲基丙烯酸低聚乙二醇酯（OEG-MA，M-w = 475 g/mol）共聚，合成了一系列水溶性温敏超支化共聚低聚乙二醇。聚合物，其特征在于通过尺寸排阻色谱法和核磁共振分析。根据单体组成，即OEG-MA：DEG-MA：EGD-MA的比例，低临界溶解温度（LCST）可以在25 ° C至90 ° C之间调节。研究了这些超支化共聚物的温敏性能，并与线性共聚物进行了比较。发现分子结构影响温度响应行为，与线性链的LCST相比，超支化聚合物的LCST降低约5-10 ℃。(C)2010 Wiley Periodicals，Inc.聚合物科学杂志A部分：聚合物化学48：2783-2792，2010
A series of water-soluble thermoresponsive hyperbranched copoly(oligoethylene glycol)s were synthesized by copolymerization of di(ethylene glycol) methacrylate (DEGMA) and oligo(ethylene glycol) methacrylate (OEG-MA, M-w = 475 g/mol), with ethylene glycol dimethacrylate (EGD-MA) used as the crosslinker, via reversible addition fragmentation chain transfer polymerization. Polymers were characterized by size exclusion chromatography and nuclear magnetic resonance analyses. According to the monomer composition, that is, the ratio of OEG-MA: DEG-MA: EGD-MA, the lower critical solution temperature (LCST) could be tuned from 25 degrees C to 90 degrees C. The thermoresponsive properties of these hyperbranched copolymers were studied carefully and compared with their linear analogs. It was found that molecular architecture influences thermoresponsive behavior, with a decrease of around 5-10 degrees C in the LCST of the hyperbranched polymers compared with the LCST of linear chains. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2783-2792, 2010