Dynamic scattering properties of mixtures of cyclic and linear homopolymers and copolymers

✍ Scribed by M. Benmouna; S. Khaldi; A. Bensafi

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 224 KB
• Volume: 35
• Category: Article
• ISSN: 0887-6266
• DOI: 10.1002/(sici)1099-0488(199706)35:8<1191::aid-polb4>3.0.co;2-x

✦ Synopsis

The dynamic scattering properties of mixtures of cyclic copolymers and homopolymers are discussed. These properties are compared with those characterizing linear chain mixtures in similar conditions. The differences between cyclic and linear chains are introduced through the form factors only. The interaction parameter between different monomer species are assumed to be the same whether they belong to cyclic or linear chains. The dynamical model is based upon a generalization of the random phase approximation neglecting hydrodynamic interaction and mode coupling effects. Despite these simplifications, substantial differences are found in the dynamics of mixtures containing cyclic copolymers and homopolymers when compared to those of linear chain systems in similar conditions of temperature, concentration, and molecular weight.