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Solution properties of polyaniline
Author(s) -
Yılmaz Faris,
Küçükyavuz Zuhal
Publication year - 2010
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2736
Subject(s) - polyaniline , radius of gyration , hydrodynamic radius , dynamic light scattering , intrinsic viscosity , polymer , virial coefficient , static light scattering , materials science , polymer chemistry , viscosity , light scattering , polyelectrolyte , particle (ecology) , molecule , chemical engineering , scattering , thermodynamics , chemistry , organic chemistry , nanotechnology , optics , physics , composite material , nanoparticle , oceanography , engineering , geology , polymerization
Solution properties of polyaniline (PANI) synthesized at various temperatures were studied using static light scattering (SLS), intrinsic viscosity, and dynamic light scattering (DLS). We demonstrated that average radius of gyration 〈 R g 〉, intrinsic viscosity [η], and average hydrodynamic radius 〈 R H 〉, of polyaniline molecules in dilute N ‐methyl‐2‐pyrrolidinone (NMP) solutions increased with decreasing synthesis temperatures, i.e.; increasing molecular weight. SLS data demonstrate that second virial coefficient ( A 2 ) decreased with increasing particle sizes suggesting that solubility of PANI in NMP decreased with increasing particle sizes. We also find that the polymers extend as the polymer concentration is lowered and that the increase in the hydrodynamic radius can be expressed by a power law of the electrostatic screening length. This behavior is typical of polyelectrolytes in dilute solution, providing a basis for understanding the conformation changes of this metallic polymer in solution. Copyright © 2009 Society of Chemical Industry