Stability analysis and scattering properties of charged crosslinked blends in solution

✍ Scribed by Mustapha Benmouna; Thomas A. Vilgis; Mabrouk Benhamou; M. Babaoui; Mohamed Daoud

• Book ID: 102495900
• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 498 KB
• Volume: 3
• Category: Article
• ISSN: 1022-1344
• DOI: 10.1002/mats.1994.040030303

✦ Synopsis

Abstract

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.