Abstract
AbstractFiber‐optic diffusing‐wave spectroscopy (FODWS) measurements were carried out on polymer latex dispersions (10 wt%) with large particle diameters (1.07, 3.2 and 5.6 μm). Autocorrelation functions (ACFs) were measured from light multiply scattered between two single‐mode optical fibers immersed in the dispersion. As expected from a photon diffusion approximation the logarithms of the ACFs were linear functions of the fiber separation and the square root of the correlation delay time. A small downward curvature of the curves at short delay times could be attributed to a slight absorption by the samples. From the ACFs a parameter κ was derived which strongly depended on particle size. Reasonable agreement was found between the experimental κ‐values and predictions by a hard‐sphere model. Potential applications of FODWS are the on‐line process control of emulsions, viscous pigment or ceramic dispersions.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Berichte der Bunsengesellschaft für physikalische Chemie
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
