DIFFUSE-X-RAY SCATTERING STUDY OF TOLUENE AND POLYBROMOSTYRENE PBRS/TOLUENE SOLUTIONS

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We 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. Chem. Phys. 94, 5208 (1991)]. We obtain the leading correction term to the capillary-wave result for C(R) dependent on the solution shear modulus E0, as well as an analytic approximation valid for large E0, including the case of pure polymer melt.
Publisher
AMER INST PHYSICS
Issue Date
1992-12
Language
English
Article Type
Article
Keywords

POLYMER-SOLUTIONS; SURFACE-MODES; WATER; REFLECTIVITY

Citation

JOURNAL OF CHEMICAL PHYSICS, v.97, no.11, pp.8536 - 8542

ISSN
0021-9606
DOI
10.1063/1.463371
URI
http://hdl.handle.net/10203/67023
Appears in Collection
PH-Journal Papers(저널논문)
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