Aggregation Behavior and Structure of Associated Polyacrylamide Hydrophobically Modified with 2-Phenoxylethylacrylate

作者：Dai Yu-hua^*; Wu Fei-peng; Li Miao-zhen; Wang Er-jian

来源：Chemical Research in Chinese Universities, 2009, 25(6): 957-962.

• Aggregation behavior and structure
• Hydrophobically modified
• Copolymer P(AM/POEA)

The aggregation behavior and structure of hydrophobically modified block copolymers of acrylamide and 2-phenoxylethylacrylate were investigated by viscometry, (1)H NMR relaxation, 2D NOESY, fluorescence and dynamic light scattering. It was found that the aggregation behavior was strongly dependent on the concentration of polymer solution and the hydrophobe contents. With varying concentration from 2.0, 6.0, 8.0 to 12.0 g/L, there were different aggregate morphologies distributed in aqueous solutions. such as monopolymer chain, micelle-like aggregate, multi-micelle aggregate and cross-linked network. According to the model of aggregation, it can give a reasonable explanation on the large magnitude enhancement of viscosity with the increasing of polymer concentration. Additional data of 2D NOESY and fluorescence show that the copolymer with higher hydrophobe content(molar fraction >= 1%) is likely to form intra-molecular association.

• 出版日期2009-11-25
• 单位中国科学院理化技术研究所; 北京石油化工学院