Segmental dynamics concentration dependence

Fig. 63. PDMS/d-bromobenzene at 357 K (0-solvent system). Reduced relaxation rate Q(Q) of the segmental dynamics as dependent on Q for various concentrations. (Reprinted with permission from [168]. Copyright 1994 Elsevier Science B.V., Amsterdam)...

Fig. 12.22 Temperature dependence of the relaxation times of the segmental dynamics (a-relaxation) for the blend system PMMA/PEO at the indicated concentrations solid squares, PMMA solid circles, PEO. The solid lines correspond to fits of the VFT equation to the data of the pure polymers. The dashed lines are due to fits of the LM model with the Kuhn lengths for PMMA as adjustable parameter (1 = 1.62 nm, theoretical value 1.38 run) (Data were taken from reference Mpoukouvalas and Floudas (2008). The concentration dependence of the whole blend was described by the Fox/Flory equations. For details see also reference Mpoukouvalas and Floudas (2008))...

Fig. 17 B/E-p dependence of the critical temperatures of liquid-liquid demixing (dashed line) and the equilibrium melting temperatures of polymer crystals (solid line) for 512-mers at the critical concentrations, predicted by the mean-field lattice theory of polymer solutions. The triangles denote Tcol and the circles denote T cry both are obtained from the onset of phase transitions in the simulations of the dynamic cooling processes of a single 512-mer. The segments are drawn as a guide for the eye (Hu and Frenkel, unpublished results)...

Fig. 23 Angular dependence of Rayleigh ratio (Rw(q)) of segmented PNIPAM-seg-St copolymer chains in water measured from static LLS, where K is a constant, q is the scattering vector and polymer concentration (C) was 7.2 x 10-7 g/mL. The inset shows the temperature dependence of the hydrodynamic radius distribution /(Rh) determined from dynamic LLS [94]...

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