Well-defined poly(sulfobetaine) brushes prepared by surface-initiated ATRP using a fluoroalcohol and ionic liquids as the solvents
Well-defined poly(sulfobetaine) brushes prepared by surface-initiated ATRP using a fluoroalcohol and ionic liquids as the solvents
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DOI：
10.1021/ma102223y
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发表时间：
2011-01
期刊：
影响因子：
5.5
通讯作者：
Y. Terayama;M. Kikuchi;M. Kobayashi;A. Takahara
中科院分区：
文献类型：
--
作者：
Y. Terayama;M. Kikuchi;M. Kobayashi;A. Takahara
表面引发原子转移自由基聚合（ATRP）（N-2-甲基丙烯酰氧乙基-N，N-二甲基）氨基乙磺酸盐）（MAES），3-（N-2-甲基丙烯酰氧基乙基-N，N-二甲基）氨基丙磺酸盐）（MAPS），和4-（N-2-甲基丙烯酰氧基乙基-N，N-二甲基）氨基丁磺酸酯）（MABS）在2，2，2-三氟乙醇（TFE），含有少量的1-己基-3-甲基咪唑鎓氯化物，在60 °C下，（磺基甜菜碱）刷和具有可预测的数均分子量的相应游离聚合物（Mn，1 × 104至3 × 105 g mol-1）和窄分子量分布（Mw/Mn < 1.2）。MAPS的ATRP一级动力学曲线表明，单体转化率ln（[M]0/[M]）与聚合时间呈线性关系。聚合速率随离子液体浓度的增加而降低。聚（MAPS）的Mn与转化率成比例地增加。以聚（MAPS）链端为引发剂进行了MAPS的序列聚合。
Surface-initiated atom transfer radical polymerization (ATRP) of 2-(N-2-methacryloyloxyethyl-N,N-dimethyl) ammonatoethanesulfonate) (MAES), 3-(N-2-methacryloyloxyethyl-N,N-dimethyl) ammonatopropanesulfonate) (MAPS), and 4-(N-2-methacryloyloxyethyl-N,N-dimethyl) ammonatobutanesulfonate) (MABS) was carried out in 2,2,2-trifluoroethanol (TFE) containing a small amount of 1-hexyl-3-methylimidazolium chloride at 60 °C to produce well-defined poly(sulfobetaine) brushes and the corresponding free polymers with predictable number-average molecular weight (Mn, 1 × 104 to 3 × 105 g mol−1) and narrow molecular weight distributions (Mw/Mn < 1.2). A first-order kinetic plot for ATRP of MAPS revealed a linear relationship between the monomer conversion index (ln([M]0/[M])) and polymerization time. The polymerization rates decreased with increasing ionic liquid concentration. The Mn of poly(MAPS) increased in proportion to the conversion. The sequential polymerization of MAPS initiated with the chain ends of poly(MAPS) ...