Molecular and hydrodynamic characteristics of star-shaped polystyrenes with one or two fullerene (C60) molecules as a branching center

Hydrodynamic Properties of “Pseudo‐Dendrimer”

“…They are lower not only than the theoretical and average experimental magnitudes for linear flexible‐chain polymers ( A 0 = 3.2 × 10 −10 erg · K −1 · mol −1/3 ),27, 44 but also less than the theoretical meaning of A 0 = 2.88 × 10 −10 erg · K −1 · mol −1/3 for hard spheres. The decreased A 0 were observed earlier for hyperbranched PCS,25, 26, 32 polyamino acids,29 carbosilane dendrimers46 and lactodendrimers 47. The reasons of the decreased magnitudes of hydrodynamic invariant for the above systems are still unclear.…”

“…The Huggins constants are rather high, lying in the range from k′ = 0.76 (THF) to k′ = 1.1 (MtBE). The increased values for k′ were obtained earlier for hyperbranched and star polymers 25, 26, 29–33. This seems to be typical compact symmetrical macromolecule solutions.…”

“…It should be noted that for the polymer studied the diffusion hydrodynamic radius R h‐D is larger about 1.2 times than viscometric one R h‐η . Similar difference is marked rather often both for linear systems28 and for polymers with complex architecture 30, 32. The reason of this phenomenon is that the law of size equivalency is not complied strictly at the translational and rotational movement of macromolecule.…”

Solution properties of comb-like polymers consisting of dimethylsiloxane monomer units

“…Such values are larger than the typical values of k ′ for linear polymers in thermodynamically good solvents . Elevated Huggins constants were obtained previously for hyperbranched and star‐like polymers . It can be suggested that the increase in k ′ is usual for solutions of compact dense macromolecules.…”

Equilibrium properties of 3-arm star-shaped polyions: an entropic sampling Monte Carlo study

“…Recently, polyelectrolytes having star-like architecture have attracted significant attention being actively investigated by using both experimental [1][2][3][4] and theoretical [5][6][7][8][9][10][11][12][13][14] methods. These macromolecules are widely used in various fields of nanotechnology, for example as a template for the synthesis of nanoparticles [15] or as emitting devices [16][17][18].…”