Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (04): 903-908.doi: 10.3866/PKU.WHXB201202171

• SOFT MATTER • Previous Articles     Next Articles

Self-Assembly Behavior of Hydrophobically Associating Polyacrylamide in Salt Solution

CHEN Hong1, WU Xiao-Yan2, YE Zhong-Bin1,2, HAN Li-Juan2, LUO Ping-Ya1   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P. R. China;
    2. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
  • Received:2011-10-31 Revised:2012-01-16 Published:2012-03-21
  • Contact: CHEN Hong
  • Supported by:

    The project was supported by the PetroChina Innovation Foundation (2011D-5006-0209).

Abstract: The self-assembly behavior of hydrophobically associating polyacrylamide (HAPAM) in salt solution was studied by static light scattering, dynamic light scattering, and atomic force microscopy (AFM). The apparent weight average molecular weight (Mw,a), root mean square radius of gyration (<Rg>), hydrodynamic radius (<Rh>), and the second virial coefficient (A2), were investigated. The ratio of <Rg> to <Rh> was used to determine the molecular shape of the polymer in salt solution. As the salt concentration increased, the polymer chain transformed from stretch to curl.

Key words: Hydrophobically associating polyacrylamide, Dynamic light scattering, Static light scattering, Viscosity, Aggregation behavior, Atomic force microscopy