Thermally Induced Swellability and Acid-Liable Dynamic Properties of Microgels of Copolymers Based on PEGMA and Aldehyde-Functionalized Monomer
Thermally Induced Swellability and Acid-Liable Dynamic Properties of Microgels of Copolymers Based on PEGMA and Aldehyde-Functionalized Monomer
复制标题
基于PEGMA和醛官能化单体的共聚物微凝胶的热致溶胀性和耐酸动态性能
DOI：
10.1021/ma1017549
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发表时间：
2010-11-23
期刊：
影响因子：
5.5
通讯作者：
Cai, Yuanli
中科院分区：
文献类型：
--
作者：
Cao, Chaowei;Yang, Ke;Cai, Yuanli
本文描述了一种新型的智能微凝胶，它在水溶液中具有完全可逆的热诱导膨胀性和对酸敏感的动力学性质。为此，合成了甲基丙烯酸3-(4-甲酰基苯氧基)-2-羟丙酯(FPHPMA)。在25℃的可见光照射下，进行了FPHPMA的RAFT聚合、FPHPMA与聚甲基丙烯酸乙二醇酯(PEGMA)的RAFT无规共聚合和PEGMA的扩链RAFT聚合。结果表明，在25℃的可见光辐射下，FPHPMA的聚合反应可控，与PEGMA的反应活性相当，且这些聚合反应具有良好的活性。因此，合成了一系列不同链长、不同组成或不同序列的FPHPMA和PEGMA的共聚物。共聚物的醛基在80℃的水溶液中对空气氧化很稳定，在低溶液温度下能很好地溶于水。
This paper describes a new class of smart microgels that possess entirely reversible thermally induced swellability and acid-liable dynamic properties in aqueous solution. To this end, 3-(4-formylphenoxy)-2-hydroxypropyl methacrylate (FPHPMA) was synthesized. RAFT polymerization of FPHPMA, RAFT random copolymerization of FPHPMA and poly(ethylene glycol) methacrylate (PEGMA), and chain extension RAFT polymerization of PEGMA using P(FPHPMA-ran-PEGMA) as a macromolecular chain transfer agent proceeded under visible light radiation at 25 °C. The results indicated the well-controlled polymerization of FPHPMA, comparable reactivity of FPHPMA and PEGMA, and living character of these polymerizations under such mild conditions. Thus, a range of well-defined copolymers of FPHPMA and PEGMA with different chain length, composition, or sequence were synthesized. The aldehyde groups of copolymers were stable against air oxidation in aqueous solution at 80 °C. These copolymers well dissolved in water at low solution tem...