Erbe, Andreas Tauer, Klaus Sigel, Reinhard 2009-02-04 Mixtures of poly(styrene) latices were used to vary the sample polydispersity for an investigation of polydispersity effects on ellipsometric light scattering (ELS) data. A procedure for high-accuracy ELS measurements is presented and the experimental distinction of coherent and incoherent scattering contributions is demonstrated. The ellipsometric parameters tan(Ψ_Q) and Δ are solely determined from coherent scattering and represent averaged ensemble properties, independent of the width of the size distribution. The change in polydispersity shows up in the parameter tan(Ψ_I), which is affected by incoherent contributions. The average particle size detected by ELS can be estimated from the intensity-weighted size distribution. A radial local birefringence in the particles has been detected and attributed to stress birefringence due to the action of the interface tension on the particles during their growth. application/pdf https://folia.unifr.ch/global/documents/301363 https://folia.unifr.ch/documents/301363/files/sigel_sci.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1021/la803500p info:eu-repo/semantics/openAccess License undefined Langmuir. - 2009, vol. 25, no. 5, p. 2703–2710 info:eu-repo/classification/udc/53 Separation of coherent and incoherent scattering contributions in ellipsometric light scattering experiments on latex mixtures http://purl.org/coar/resource_type/c_6501