Steady-state and Dynamic Fluorescence Studies on Self-associating Behavior and Aggregate of Hydrophobically Associating Copolymer P(AM/POEA)

Acta Chimica Sinica ›› 2004, Vol. 62 ›› Issue (8): 823-828. Previous Articles Next Articles

稳态和动态荧光研究疏水缔合共聚物P(AM/POEA)的自缔合行为和聚集体

戴玉华, 吴飞鹏, 李妙贞, 王尔鑑

中国科学院理化技术研究所, 北京, 100101

投稿日期:2003-08-12 修回日期:2003-12-30 发布日期:2014-02-18
通讯作者: 王尔鑑,E-mail:g208@ipc.ac.cn E-mail:g208@ipc.ac.cn
基金资助:
国家重点基础研究发展规划(No.G199022503)资助项目.

Steady-state and Dynamic Fluorescence Studies on Self-associating Behavior and Aggregate of Hydrophobically Associating Copolymer P(AM/POEA)

DAI Yu-Hua, WU Fei-Peng, LI Miao-Zhen, WANG Er-Jian

Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101

Received:2003-08-12 Revised:2003-12-30 Published:2014-02-18

Abstract

The different steady-state and dynamic fluorescence methods, including luminescence probe, label fluorescence and fluorescence quenching measurements, have been used to investigate the association properties of the copolymer P(AM/POEA), composed of acrylamide (AM) and a small amount of 2-phenoxyethyl acrylate (POEA) (x_POEA≤0.01) as hydrophobe in aqueous solution. The experimental results show that the self-associating behavior and aggregate structure of the copolymer are significantly dependent on their chain structure and concentration. The copolymers with the multi-blocky structure obtained by micellar copolymerization exhibit a large thickening property due to the intermolecular hydrophobical association, but that does not occur in the case of the random copolymers prepared by the conventional copolymerization. The association type and the thickening ability of the copolymers were found to directly related to the hydrophobe content of copolymer. With raising hydrophobe content the reduced viscosity firstly increases and then decreases due to the competition between intra- and inter-chain associations. Based on the fluorescence studies the multi-polymeric aggregate structure model was suggested, which further grows into cross-linked multi-aggregate and network as polymer aggregate concentration is increased. The ordered alignment phenomena of hydrophobe in the aggregate were also observed.

Key words: fluorescence study, association behavior, aggregate structure, viscosity enhancement, copolymer P(AM/POEA)

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DAI Yu-Hua, WU Fei-Peng, LI Miao-Zhen, WANG Er-Jian. Steady-state and Dynamic Fluorescence Studies on Self-associating Behavior and Aggregate of Hydrophobically Associating Copolymer P(AM/POEA)[J]. Acta Chimica Sinica, 2004, 62(8): 823-828.

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稳态和动态荧光研究疏水缔合共聚物P(AM/POEA)的自缔合行为和聚集体

Steady-state and Dynamic Fluorescence Studies on Self-associating Behavior and Aggregate of Hydrophobically Associating Copolymer P(AM/POEA)

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