Structure and Rigidity of Molecules of Aromatic Polyamides in Solutions

Self-Organization and Morphological Characteristics of the Selenium Containing Nanostructures on the Base of Strong Polyacids

“…Molecular dispersion of the solutions of the forming nanostructures was estimated by means of birefringence (double refraction) method [23] using a character of gradient dependence of the value of double refraction n. The value of n was determined subject to rate of rotation of the rotor "g" and concentration of the solution "c" provided constant ratio selenium : polymer.…”

“…where n s -solvent refractory index, T -absolute temperature, R -universal gas constant, f(p) -tabulated function of ratio of axes of stiff ellipsoid approximating the particle [23].…”

“…Calculation of average density of nanostructures at = 0.1 by formula (2) demonstrated that though the nanostructures with density Ф * =0.02 and 0.04 g/cm 3 are formed (Table) that exceed a density of polymer ball [23] but less than for selenium containing spherical nanostructures on the base of nonionic rigid chain molecules (Ф * =(0.12 -0.14) g/cm 3 ) [12]. Thus it was revealed that in both cases super high molecular nanostructures are formed ( * w = 200×10 6 /DNA as stabilizer/ and * w = 75×10 6 /PAMS as stabilizer/) with close dimensions (R * g -statistic dimensions of nanostructure, R * h -hydrodynamic dimensions of nanostructure) and average densities Ф * (Table).…”

Self-assembly in the solutions of poly(methyl methacrylates) end-capped with fluorophenyl groups

“…According to [25], in PMMA-acetone solutions a=0.72, A=1.5 nm, the Kuhn segment of PMMA consists of six monomer units. Fig.…”

Correlations of hydrodynamic characteristics of macromolecules and their retention volumes in GPC

“…The parameters of equations of type (2 ) can be interrelated in pairs. Thus, if, e.g., log Do = C, + CloVR is com- Hence, the properties of the universal calibration dependence will be satisfied if the retention volume is com- ( 1 ) , log( Mk,) (2), log( so[ 71 ) (3), log( soks) (4), log Do (5) vs. retention volume VR (open circles, P V P filled circles, PEG). …”