On the swelling properties of pom-pom polymers in dilute solutions. Part 1: Symmetric case

We consider the simplest representative of class multiply branched polymer macromolecules, known as a pom-pom structure. The molecule consists backbone linear chain terminated by two branching points with functionalities (numbers side chains) f1 and f2, respectively. In symmetrical case, considered in present study, one has = f2 f total number chains F 2f + 1. Whereas rheological behaviour melts molecules are intensively studied so far, we turn our attention towards conformational properties such polymers regime dilute solution. universality concept, originated critical phenomena scaling polymers, is used this study. To be able to compare outcome direct renormalization approach that obtained via dissipative particle dynamics simulations, concentrated on universal ratios shape characteristics. way differences energy length scales eliminated depend only space dimension, solvent quality type molecular branching. Such were evaluated both for whole its individual branches. For some properties, theory simulations excellent agreement, other found interval where agree reasonably well. Combination theoretical simulation approaches provide thorough quantitative description peculiarities swelling effects spatial extension compared results simpler topologies.