Chinese Journal of Magnetic Resonance ›› 2004, Vol. 21 ›› Issue (1): 67-71.

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AGGREGATION BEHAVIOR OF A NOVEL HYDROPHOBICALLY ASSOCIATING COPOLYMER OF PAM/POEA IN AQUEOUS SOLUTION STUDIED BY 1H NMR

GAO Hong-Chang1, MAO Shi-Zhen1*, LI Miao-Zhen2, YUAN Han-Zhen1, WANG Er-Jian2, DU You-Ru1   

  1. 1.State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, People's Republic of China; 2.Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing 100101, People's Republic of China
  • Received:2003-10-25 Revised:2003-12-20 Online:2004-03-05 Published:2004-03-05
  • Supported by:

    国家重点基础研究发展规划发展项目“大幅度提高石油采收率的基础研究”(G199022503)和国家自然科学基金(230373087)资助.

Abstract:

1H NMR spectroscopy with two-dimensional nuclear Overhauser enhancement (2D NOESY) measurements was used to study the aggregation behavior of a novel hydrophobically associating copolymer composed mainly of acrylamide (AM) and a small amount of 2phenoxyethyl acrylate (POEA). The results show that aggregation of the copolymer PAM/POEA mainly derives from the interactions among the phenoxy groups and that between the phenoxy group and the acrylamide backbone. 2D NOESY experiments unambiguously show that, in the  POEA/PAM aggregates, the phenoxy groups of the hydrophobic parts of POEA are possibly located in the vicinity of the acrylamide backbones.

Key words: 1H NMR, 2D NOESY, PAM/POEA, aggregation, copolymer