Publikation: High Ionic Strength Promotes the Formation of Spherical Copolymer Particles
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Macromolecular Chemistry and Physics. Wiley-Blackwell. 2011, 212(19), pp. 2071-2086. ISSN 0025-116X. eISSN 1521-3935. Available under: doi: 10.1002/macp.201100206
Zusammenfassung
A comprehensive experimental study of thermally initiated styrene-styrene sulfonate emulsion copolymerization in the presence of 15 different low-molecular-weight electrolytes clarifies the enormous influence of both the concentration and nature of the added salt on the outcome of the polymerization. The ionic strength (IS) has a direct influence on the styrene sulfonate content in the final copolymer and determines whether the physical state of the final reaction product is a solution or dispersion. Stable latexes have been obtained for IS as high as 18 M. Electron microscopy images show irregularly shaped clusters at low and spherical particles at high IS. The properties of the copolymer molecules and dispersion can be additionally modified by the chemical properties of the counter- and coions introduced with the salt.
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WEBER, Nancy, Miriam M. UNTERLASS, Klaus TAUER, 2011. High Ionic Strength Promotes the Formation of Spherical Copolymer Particles. In: Macromolecular Chemistry and Physics. Wiley-Blackwell. 2011, 212(19), pp. 2071-2086. ISSN 0025-116X. eISSN 1521-3935. Available under: doi: 10.1002/macp.201100206BibTex
@article{Weber2011Ionic-54833,
year={2011},
doi={10.1002/macp.201100206},
title={High Ionic Strength Promotes the Formation of Spherical Copolymer Particles},
number={19},
volume={212},
issn={0025-116X},
journal={Macromolecular Chemistry and Physics},
pages={2071--2086},
author={Weber, Nancy and Unterlass, Miriam M. and Tauer, Klaus}
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<dcterms:abstract xml:lang="eng">A comprehensive experimental study of thermally initiated styrene-styrene sulfonate emulsion copolymerization in the presence of 15 different low-molecular-weight electrolytes clarifies the enormous influence of both the concentration and nature of the added salt on the outcome of the polymerization. The ionic strength (IS) has a direct influence on the styrene sulfonate content in the final copolymer and determines whether the physical state of the final reaction product is a solution or dispersion. Stable latexes have been obtained for IS as high as 18 M. Electron microscopy images show irregularly shaped clusters at low and spherical particles at high IS. The properties of the copolymer molecules and dispersion can be additionally modified by the chemical properties of the counter- and coions introduced with the salt.</dcterms:abstract>
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