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Particle masses of the order of 108-101° gmo1-1 and the radii of gyration and hydrodynamic radii of spherical poly(methyl rnethacrylate) particles were characterized by combined static and dynamic light scattering. The dispersions were prepared by dispersion polymerization and stabilized by polystyrene-blockpoly( ethylene-co-propylene). The radii of gyration were calculated from the measured particle scattering intensity by fitting procedures using the Rayleigh formula for spheres. This practice allows the use of all points actually measured instead of the uncertain values at low angles only. The strongly disturbing influence of small contents of large particles (aggregated particles, dust) was eliminated. The autocorrelation functions were measured by dynamic light scattering and analysed by the Contin procedure. The coronas and densities of the particles could be characterized on the basis of the geometric radii of the pure main components.

Посилання на статтю:

Determination of sizes of spherical particles, prepared by dispersion polymerization of methyl methacrylate in non-aqueous medium, by analysis of the particle scattering and autocorrelation functions / Martin Helmstedt* and Hartmut Schafer // Polymer. – 1994. – Vol 35. – P. 3377-3383.

Determination of sizes of spherical particles, prepared by dispersion polymerization of methyl methacrylate in non-aqueous medium, by analysis of the particle scattering and autocorrelation functions - Завантажити.