The peculiarities of the fluctuation motions of diallyldimethylammonium chloride polyions (PDADMAC) in 0.01M, 0.025M, and 0.05M NaCl aqueous solutions were studied depending on the polyion concentration by means of dynamic and static light scattering. The behavior of the system in a transitional region between dilute and unentangled semidilute solutions was investigated. The nature of the fastest and slowest motion modes is discussed; additional modes observed upon scattering in semidilute solutions were attributed to interaction modes.
61.25.Hq Macromolecular and polymer solutions; polymer melts; swelling
66.30.Hs Self-diffusion and ionic conduction in nonmetals
$^1$Faculty of Physics, Chair of Polymer and Crystal Physics, Moscow State University, Moscow, 119991, Russia
$^2$Faculty of Chemistry, Department of Polymer Science, Moscow State University, Moscow, 119991, Russia
Science News of the Faculty of Physics, Lomonosov Moscow State University
This new information publication, which is intended to convey to the staff, students and graduate students, faculty colleagues and partners of the main achievements of scientists and scientific information on the events in the life of university physicists.