Influence of polydispersity and assumed distribution on functional dependences of light scattering transmission methods

Vavra, J.; Bocko, J.

doi:10.1007/bf01517247

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…For more concentrated suspensions, Mie theory for the scattering cross section would have to be modified to include for the effect of multiple scatters but a similar dependence on the particle size and polydispersity would be expected. 40 Further optimization of the optical properties of the latexes was attempted. From the presented results it is evident that the microlatex colloidal properties are closely linked to n of the polymerization, i.e., polydispersity and/or average particle size.…”

Section: Resultsmentioning

confidence: 99%

“…Decreasing the particle size leads to an increase in the optical transmittance of the medium, as would decreasing the PdI. For more concentrated suspensions, Mie theory for the scattering cross section would have to be modified to include for the effect of multiple scatters but a similar dependence on the particle size and polydispersity would be expected …”

Section: Resultsmentioning

confidence: 99%

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A New Method for the Preparation of Concentrated Translucent Polymer Nanolatexes from Emulsion Polymerization

et al. 2010

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A novel method for the preparation of concentrated, colloidally stable, translucent polymer nanolatexes is presented. Herein nanolatexes are obtained from emulsion polymerization, utilizing the potential of catalytic chain transfer to enhance the particle nucleation efficiency. Low amounts of emulsifier are required (<8% w/w based on monomer) while the nanolatexes concentration can be increased to 40% w/w. The nanolatexes are translucent in appearance, which was correlated to the average particle size and width of the particle size distribution using Mie theory. Increasing the nanolatex concentration was found to have no deteriorating effect on either the optical or colloidal properties. Preparing translucent nanolatexes via this method is advantageous, as the amount of emulsifier is significantly reduced without sacrificing the optical transparency or the high interfacial surface area of the polymer colloids.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A New Method for the Preparation of Concentrated Translucent Polymer Nanolatexes from Emulsion Polymerization

et al. 2010

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“…(Turbidity is defined by the light transmittance, I/I 0 , through a distance, d, of material; τ d = −(1/d) ln I/I 0 ).) From the Mie theory of light scattering the relation between lim cp→0 (τ d /c p ) and the average particle diameter in a suspension can be numerically (not analytically) calculated [14] (c p is the particle concentration) for the concrete wavelength and refractive index ratio.…”

Section: Resultsmentioning

confidence: 99%

The destruction effect of a pulse discharge in water suspensions

Mikula¹,

Panák²,

Dvonka³

1997

Plasma Sources Sci. Technol.

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A high-energy capacitor bank (2 × 1 µF/20 kV in a Blumlein circuit) was discharged over about 3 µs through a 7 mm electrode gap in water suspensions of different materials-TiO 2 powder, wood materials (sawdust, needles)-and methylhydroxyethylcellulose dissolved in water. The Mach number of the compressional wave produced by the expanding discharge channel achieved a value of about 0.5. The destruction of added materials was tested using various methods: turbidity and covering ability of the TiO 2 -white, acid hydrolysis of beech sawdust, microbiological processes of spruce needles and molecular weight measurements of the cellulose derivative. In the used power conditions the physical destruction of materials dispersed in water (degassing and decomposition of physically bonded particles) is a dominant effect caused mainly by the compressional wave that can affect material in the whole volume. The chemical destruction probably occurs just in the vicinity or inside the plasma channel due to the action of plasma particles or energetic radiation.

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Application of Regression Analysis in spectroturbidity size‐characterization methods

Vavra

Antalik

Liška

1995

Part & Part Syst Charact

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The possibilities of applying specific turbidity and turbidity ratio methods in the distributional analysis of PVC and SO, dispersions with spherical particles are discussed. The calculations of the best estimates of distribution function parameters were performed numerically using the simplex method. For theoretical computations of light-scattering characteristics, the exact Lorenz-Mie theory was applied. A good correlation with the results of angular light scattering and electron microscopy was found.

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Influence of polydispersity and assumed distribution on functional dependences of light scattering transmission methods

Cited by 6 publications

References 4 publications

A New Method for the Preparation of Concentrated Translucent Polymer Nanolatexes from Emulsion Polymerization

A New Method for the Preparation of Concentrated Translucent Polymer Nanolatexes from Emulsion Polymerization

The destruction effect of a pulse discharge in water suspensions

Application of Regression Analysis in spectroturbidity size‐characterization methods

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