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学科主题: 高分子化学
题名: Synthesis and characterization of PNIPAM-b-(PEA-g-PDEA) double hydrophilic graft copolymer
其他题名: Synthesis and characterization of PNIPAM-b-(PEA-g-PDEA) double hydrophilic graft copolymer
作者: Feng C(冯纯) ; Shen Z(沈重) ; Gu LN(顾丽娜) ; Zhang S(张森) ; Li LT(李利涛) ; Lu GL(陆国林) ; Huang XY(黄晓宇)
通讯作者: 黄晓宇
刊名: J. Polym. Sci. Pol. Chem.
发表日期: 2008
卷: 46, 期:16, 页:5638-5651
收录类别: SCI
部门归属: 上海有机化学研究所
英文摘要: A series of well-defined double hydrophilic graft copolymers, consisting of poly(N-isopropylacrylamide)-b-poly(ethyl acrylate) (PNIPAM-b-PEA) backbone and poly(2-(diethylamino)ethyl methacrylate) (PDEA) side chains, were synthesized by successive atom transfer radical polymerization (ATRP). The backbone was firstly prepared by sequential ATRP of N-isopropylacrylamide and 2-hydroxyethyl acrylate at 25 degrees C using CuCl/tris(2-(dimethylamino)ethyl)amine as catalytic system. The obtained diblock copolymer was transformed into macroinitiator by reacting with 2-chloropropionyl chloride. Next, grafting-from strategy was employed for the synthesis of poly(N-isopropylacrylamide)-b-[poly(ethyl acrylate)-g-poly(2-(diethylamino)ethyl methacrylate)] (PNIPAM-b-(PEA-g-PDEA)) double hydrophilic graft copolymer. ATRP of 2-(diethylamino)ethyl methacrylate was initiated by the macroinitiator at 40 degrees C using CuCl/hexamethyldiethylenetriamine as catalytic system. The molecular weight distributions of double hydrophilic graft copolymers kept narrow. Thermo- and pH-responsive micellization behaviors were investigated by fluorescence spectroscopy, H-1 NMR, dynamic light scattering, and transmission electron microscopy. Unimolecular micelles with PNIPAM-core formed in acidic environment (pH = 2) with elevated temperature (>= 32 degrees C); whereas, the aggregates turned into vesicles in basic surroundings (pH >= 7.2) at room temperature. (C) 2008 Wiley Periodicals, Inc.
语种: 英语
相关网址: 查看原文
WOS记录号: WOS:000258602700029
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/24391
Appears in Collections:高分子材料研究室_期刊论文

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Recommended Citation:
Feng C,Shen Z,Gu LN,et al. Synthesis and characterization of PNIPAM-b-(PEA-g-PDEA) double hydrophilic graft copolymer[J]. J. Polym. Sci. Pol. Chem.,2008,46(16):5638-5651.
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