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    题名: Thermo- and pH-induced self-assembly of P(AA-b-NIPAAm-b-AA) triblock copolymers synthesized via RAFT polymerization
    作者: Kuo, Chih-Yu;Don, Trong-Ming;Hsu, Shih-Chi;Lee, Chia-Fen;Chiu, Wen-Yen;Huang, Chih-Yuan
    关键词: block copolymer;core-shell particles;nanogels;reversible addition fragmentation chain transfer (RAFT);RAFT polymerization;self-assembly;stimuli–sensitive polymers
    日期: 2016-04-15
    上传时间: 2016-11-16 02:11:07 (UTC+8)
    出版者: John Wiley & Sons, Inc.
    摘要: A series of environmentally sensitive ABA triblock copolymers with different block lengths were prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization from acrylic acid (AA) and N-isopropylacrylamide (NIPAAm). The GPC and 1H NMR analyses demonstrated the narrow molecular weight distribution and precise chemical structure of the prepared P(AA-b-NIPAAm-b-AA) triblock copolymers owing to the controlled/living characteristics of RAFT polymerization. The lower critical solution temperature (LCST) of the triblock copolymers could be tailored by adjusting the length of PAA block and controlled by the pH value. Under heating, the triblock copolymers underwent self-assemble in dilute aqueous solution and formed nanoparticles revealed via TEM images. Physically crosslinked nanogels induced by inter-/intra-hydrogen bonding or core-shell micelle particles thus could be obtained by changing environmental conditions. With a well-defined structure and stimuli-responsive properties, the P(AA-b-NIPAAm-b-AA) copolymer is expected to be employed as a nanocarrier for biomedical applications in controlled-drug delivery and targeting therapy.
    關聯: Journal of Polymer Science, Part A: Polymer Chemistry 54(8), pp.1109-1118
    DOI: 10.1002/pola.27950
    显示于类别:[化學工程與材料工程學系暨研究所] 期刊論文

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