Hydrodynamic, optical, and electrooptical properties of macromolecules of third-generation cylindrical dendrimers in chloroform and dichloroacetic acid

• Published in: Polymer science. Series A, Chemistry, physics Chemistry, physics, 2010, Vol.52 (1), p.8-18
• Main Authors: Tsvetkov, N. V., Andreeva, L. N., Filippov, S. K., Bushin, S. V., Bezrukova, M. A., Marchenko, I. A., Strelina, I. A., Alyab’eva, V. P., Girbasova, N. V., Bilibin, A. Yu
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Polymer Sciences; Solutions
• ISSN: 0965-545X; 1555-6107
• DOI: 10.1134/S0965545X10010025

Acrylic polymers containing side dendrons of the third generation based on L -aspartic acid have been studied via the methods of molecular hydrodynamics, dynamic and static light-scattering, optics, and electrooptics. There are marked differences in hydrodynamic and optical properties of the macromolecules under study and previously examined polymers with side dendrons of first and second generations. In the range of degrees of polymerization from 10 to 40, these macromolecules possess an extremely low shape asymmetry. Experiments demonstrate the predominant orientation of end side dendrons along the main molecular chain. In chloroform solutions, the orientation of macromolecules in hydrodynamic and electric fields occurs according to the large-scale mechanism. In dichloroacetic acid, the hydrodynamic dimensions of macromolecules decrease, an effect that is accompanied by an increase in the kinetic flexibility of polymer chains.