A double-pass optical beam deflection instrument for the measurement of diffusion, thermodiffusion and Soret coefficients in liquid mixtures and its application to polymer analysis
Abstract
We have developed a new double-pass optical beam deflection instrument for the measurement of diffusion, thermodiffusion and Soret coefficients in liquid mixtures. The increased sensitivity of the instrument results from a second passage of the readout laser beam through the Soret cell containing the sample. An elegant description of the total beam deflection is achieved by means of a transfer matrix formalism. The higher sensitivity allows for a reduction of the length of the detection arm and a compact and stiff design of the instrument. The performance of the new apparatus is demonstrated by its application to polymer analysis for the determination of the molar mass distribution of the polymer from the distribution of diffusion rates by means of the CONTIN algorithm.
Funding source: Deutsches Zentrum für Luft- und Raumfahrt
Award Identifier / Grant number: (DLR, Grant 50WM2147)
Funding source: Deutsche Forschungsgemeinschaft
Award Identifier / Grant number: (DFG, Grant No. DFG, KO1541/13-1)
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Research ethics: Not applicable.
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Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission. RR and MH built the instrument and performed the measurements, WK wrote the manuscript. All authors participated in the data evaluation.
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Competing interests: The authors state no competing interests.
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Research funding: This work was supported by Deutsches Zentrum für Luft- und Raumfahrt (DLR, Grant 50WM2147) and by Deutsche Forschungsgemeinschaft (DFG, Grant No. DFG, KO1541/13-1).
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Data availability: The raw data can be obtained on request from the corresponding author.
References
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Articles in the same Issue
- Frontmatter
- Special Issue Articles Devoted to the 15th International Meeting on Thermodiffusion – IMT15 2023; Guest Editors: Diana Dubert, Fina Gavalda and Xavier Ruiz
- Editorial (15th International Meeting on Thermodiffusion – IMT15 2023)
- Thermodiffusion, diffusion and Soret coefficients of binary polymeric mixtures in toluene and cyclohexane
- A double-pass optical beam deflection instrument for the measurement of diffusion, thermodiffusion and Soret coefficients in liquid mixtures and its application to polymer analysis
- Application of a three-laser optical digital interferometry in a thermogravitational analysis for binary and ternary mixtures
- Original Research Articles
- Mass transfer at vapor-liquid interfaces of H2O + CO2 mixtures studied by molecular dynamics simulation
- Kinetic and thermodynamic approach to precisely solve the unsteady Rayleigh flow problem of a rarefied homogeneous charged gas under external force influence
- Transient cold-front-water through y-shaped aluminium ducts: nature of turbulence, non-equilibrium thermodynamics, and velocity at the converged and diverged outlets
- Thermoeconomic optimization with a dissipation cost
- Analytical solutions for nonequilibrium bioheat transfer in tumor during magnetic nanoparticles hyperthermia
- Composite liquids under high-power heating: superheat of water in micro-explosion of water-in-fuel droplets
Articles in the same Issue
- Frontmatter
- Special Issue Articles Devoted to the 15th International Meeting on Thermodiffusion – IMT15 2023; Guest Editors: Diana Dubert, Fina Gavalda and Xavier Ruiz
- Editorial (15th International Meeting on Thermodiffusion – IMT15 2023)
- Thermodiffusion, diffusion and Soret coefficients of binary polymeric mixtures in toluene and cyclohexane
- A double-pass optical beam deflection instrument for the measurement of diffusion, thermodiffusion and Soret coefficients in liquid mixtures and its application to polymer analysis
- Application of a three-laser optical digital interferometry in a thermogravitational analysis for binary and ternary mixtures
- Original Research Articles
- Mass transfer at vapor-liquid interfaces of H2O + CO2 mixtures studied by molecular dynamics simulation
- Kinetic and thermodynamic approach to precisely solve the unsteady Rayleigh flow problem of a rarefied homogeneous charged gas under external force influence
- Transient cold-front-water through y-shaped aluminium ducts: nature of turbulence, non-equilibrium thermodynamics, and velocity at the converged and diverged outlets
- Thermoeconomic optimization with a dissipation cost
- Analytical solutions for nonequilibrium bioheat transfer in tumor during magnetic nanoparticles hyperthermia
- Composite liquids under high-power heating: superheat of water in micro-explosion of water-in-fuel droplets