Abstract
A new photon correlation spectrometer has been constructed, that allows the simultaneous recording of frequency-integrated and incoherent-elastic light scattering (FILS and IELS). Its utility and capability are demonstrated in measurements on dilute toluene solutions of narrow-distribution polystyrene as well as on aqueous suspensions of polystyrene-latex particles and their mixtures. Mn and Mw values, determined using IELS, are in good agreement with both manufacturers and FILS data. The first reduced cumulant, Γ/q2, shows no angular dependence in the range of 40 to 120°. At smaller and larger angles a drop of Γ/q2 is observed, caused by backscattering and dust-particles. Measurements on mixtures of PS-Latex demonstrate that our spectrometer is capable for detecting the bimodal distribution of spherical particles.
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Nordmeier, E., Lechner, M. Simultaneous Frequency-Integrated and Incoherent-Elastic Light Scattering: Description of a New Photon-Correlation Spectrometer. Polym J 21, 623–632 (1989). https://doi.org/10.1295/polymj.21.623
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DOI: https://doi.org/10.1295/polymj.21.623
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