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Stability analysis and scattering properties of charged crosslinked blends in solution
Author(s) -
Benmouna Mustapha,
Vilgis Thomas A.,
Benhamou Mabrouk,
Babaoui M.,
Daoud Mohamed
Publication year - 1994
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/mats.1994.040030303
Subject(s) - polymer , chemical physics , scattering , polymer blend , dielectric , thermodynamics , rigidity (electromagnetism) , materials science , light scattering , polymer chemistry , chemistry , physics , optics , composite material , copolymer , optoelectronics
The phase behavior and scattering properties of crosslinked charged polymer blends in solution are examined. De Gennes' analogy between the effects of crosslinks in a network and electrostatic charges in a dielectric medium on the scattering properties and the phase behavior of crosslinked polymer blends is used. This analogy is extended to include the effects of screening in order to improve its agreement with the experimental data in the small q range. The excluded volume interactions are explicitely introduced through the blob model. The enhancement of compatibility of the mixture and the increase of its rigidity constant are evaluated in certain cases. The limit of neutral polymers is discussed because it corresponds to the case of charged mixtures in the presence of excess salt. The kinetics of the microphase separation transition is briefly discussed. A dynamical model including the long range hydrodynamic interaction is presented. The relaxation frequency of the stable modes and the growth rate of unstable ones are also considered.