Abstract
A comprehensive experimental study of aqueous heterophase homopolymerization of 2-hydroxyetyl methacrylate revealed special conditions that must be fulfilled in order to obtain stable latex particles in the nanometer size range. The results clearly show that the formation and the stability of this kind of hydrophilic latex particle strongly depends on the hydrophobic-hydrophilic properties of both the initiating radicals and the stabilizers. Hydrophobic initiators in combination with sodium alkyl sulfate surfactants of proper chain lengths or ionic surface-active initiators lead to stable latex particles. In the latter case the particles keep their identity and spherical shape even after drying of the aqueous dispersion.
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Acknowledgements
The authors are indebted to Mrs. Rona Pitschke for making the TEM pictures and to Dr. G. Czichocki for placing the sodium alkyl sulfate surfactants at our disposal. A. M. Imroz Ali is thankful for a scholarship from the German Research Foundation (DFG), grant number TA135/5. Furthermore, the authors thank the Max Planck Society and the Max Planck Institute of Colloids and Interfaces for financial support.
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Tauer, K., Ali, A.M.I. & Sedlak, M. On the preparation of stable poly(2-hydroxyethyl methacrylate) nanoparticles. Colloid Polym Sci 283, 351–358 (2005). https://doi.org/10.1007/s00396-004-1169-1
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DOI: https://doi.org/10.1007/s00396-004-1169-1