Science and Technology Production
Article
Authorship
Guillermo E. Eliçabe
;
SCHROEDER, WALTER FABIAN
;
Gloria L. Frontini
;
Valeria Pettarin
Date
2007
Publishing House and Editing Place
WILEY-VCH
Magazine
Particle & Particle Systems Characterization,
vol. 24
(pp. 163-172)
- ISSN 0934-0866
WILEY-VCH
WILEY-VCH
ISSN
0934-0866
Summary
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SIGEVA
In this work a light scattering apparatus for the study of heterogeneous liquid systems of evolving morphology is presented. A Fraunhofer configuration consisting of a linear array of photodiodes is used to detect the light scattered by thin samples illuminated by a He-Ne laser light. Temperature control is available. The instrument is tested with the polymerization induced phase separation of a thermosetting polymer formulated with a divinylester resin copolymerized with styrene and modified w...
In this work a light scattering apparatus for the study of heterogeneous liquid systems of evolving morphology is presented. A Fraunhofer configuration consisting of a linear array of photodiodes is used to detect the light scattered by thin samples illuminated by a He-Ne laser light. Temperature control is available. The instrument is tested with the polymerization induced phase separation of a thermosetting polymer formulated with a divinylester resin copolymerized with styrene and modified with poly(methylmethacrylate). The system is successfully modeled as an arrangement of particles growing in size and number, and varying in composition. The ability of the experimental setup to provide results that can be quantitatively analyzed is checked using microspherical polystyrene standards. Different samples with nominal sizes of 0.5, 1 and 2 mm are used in different combinations of sample thickness and concentration. The analysis of the light scattering spectra is performed using inverse techniques to estimate the particle size distribution of the microspheres. The results agree with previous knowledge of the parameters of the samples.
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Key Words
POLYMER PHASE SEPARATIONPARTICLE SIZE DISTRIBUTIONINVERSE PROBLEMSTATIC LIGHT SCATTERING