International Journal of Thermophysics

, Volume 31, Issue 10, pp 1928–1934 | Cite as

Advances in Ripplon Surface Laser-Light Scattering Measurement for Highly Viscous Polymer-Solvent System

  • Kazuhiro Oki
  • Yuji Nagasaka


The surface properties of a polymer organic-solvent system was measured using a ripplon surface laser-light scattering (SLLS) technique. The power spectrum (PS) of a ripplon can be obtained by fast Fourier transform (FFT) analysis of the beat signal of scattered light using ripplon SLLS. However, the PS peak shifts to lower frequencies due to the low surface tension of typical organic solvents. This shift means that the PS can be easily affected by external vibrational noise. In addition, higher viscosities broaden the shape of the spectra so that the peak becomes less clear. It is therefore difficult to find a definite peak frequency and to determine its width at half maximum for analyzing surface properties. To address these issues, a new system for SLLS was developed and was used to demonstrate that the available viscosity measurement range can be extended to the higher values needed for organic-solvent systems.


Coustic-optic modulator Laser light scattering Polymer-solvent system Surface viscoelasticity 


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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.School of Integrated Design EngineeringKeio UniversityYokohamaJapan
  2. 2.Department of System Design EngineeringKeio UniversityYokohamaJapan

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