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Investigation of the aggregation phenomenon of polyaniline in dilute solutions
Author(s) -
Liao YunHsin,
Kwei Ti Kang,
Levon Kalle
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021961003
Subject(s) - polyelectrolyte , virial coefficient , chemistry , polyaniline , static light scattering , intrinsic viscosity , polymer chemistry , polymer , viscoelasticity , light scattering , dynamic light scattering , viscosity , hydrogen bond , chemical engineering , scattering , thermodynamics , materials science , organic chemistry , molecule , optics , composite material , physics , nanoparticle , engineering , polymerization
Aggregation of polyaniline chains in dilute solutions was observed in N ‐methyl‐2‐pyrrolidone by light scattering, gel permeation chromatography, and viscosity measurements. The aggregation resulted in a negative second virial coefficient in light scattering measurements and concave reduced viscosity curves. The driving force for aggregation is assumed to be a combination of hydrogen bounding between the imine and amine groups and the rigidity of backbone, and the aggregation was modeled to occur via side‐on packing of wormlike chains. Polyelectrolyte‐like viscosity behavior was also observed when a small amount of salt was added and the electrostatic interaction in polyelectrolyte polymer based on the Odijk theory was used to explain the role of the salt.