Diffuse x‐ray scattering study of toluene and polybromostyrene PBrS/toluene solutions

W. Zhao, X. Zhao, J. Sokolov, M. H. Rafailovich, M. K. Sanyal, S. K. Sinha, B. H. Cao, M. W. Kim, B. B. Sauer
1992 Journal of Chemical Physics  
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more » ... ics of nanofluids: Influence of electroviscous effects and particle agglomeration yve report measurements and calculations of x-ray diffuse scattering from the liquid-vapor Interface of toluene and polybromostyrene(PBrS)/toluene solutions for polymer molecular weights 90 K and 1 M at concentrations up to 11.7 volume %, well into the entangled semidilute regime. We have calculated the static structure factor S(k) and equal time height-height correlation function C(R) for surface hydrodynamic modes based on a coupled two-fluid model where the polymer response is taken to be that of a Maxwell viscoelastic material [Harden et al, J. Chern. Phys. 94, 5208 (1991)]. We obtain the leading correction term to the capillary-wave result for C(R) dependent On the solution shear modulus Eo, as well as an analytic approximation valid for large Eo, including the case of pure polymer melt.
doi:10.1063/1.463371 fatcat:n5bfsugievemnigdtar2an2pai