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Poly(N-vinylcaprolactam) microgels. Polymeric stabilization with poly(vinyl alcohol)

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Abstract

Poly(vinyl alcohol), PVA, with different molecular weights, Mw, and degrees of hydrolysis has been used to study the steric stabilization of microgels based on poly(N-vinylcaprolactam). The stabilizer influences the particle size and stability, but has no influence on the thermal properties. The thermal behavior of microgels depends on the heating rate: slow heating leads to the formation of aggregates and fast heating to an intramolecular collapse. The aggregates showed an unusual angular dependence of the diffusion coefficient, which can be explained by the presence of probably an additional rotational diffusion.

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Acknowledgements

The authors acknowledge the European Graduate School "Advanced Polymer Materials" (EGK 720–1, DFG) for financial support. We thank Prof. W. Burchard (University of Freiburg/Brsg.), Dr. M. Helmstedt (University of Leipzig), and Dr. P. Stepanek (Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic) for the discussion of the light scattering results. Dr. S. Richter thanks the Deutsche Forschungsgemeinschaft (DFG) for financial support (grant-no. RI 1079/1–2).

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Authors and Affiliations

  1. Institute of Physical Chemistry and Electrochemistry, Dresden University of Technology, Mommsenstrasse 13, D-01062, Dresden, Germany

    Volodymyr Boyko, Sven Richter & Karl-Friedrich Arndt

  2. Institute of Macromolecular Chemistry and Textile Chemistry, Dresden University of Technology, Mommsenstrasse 13, D-01062 , Dresden, Germany

    Andrij Pich

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  1. Volodymyr Boyko
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  2. Sven Richter
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  3. Andrij Pich
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  4. Karl-Friedrich Arndt
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Correspondence to Volodymyr Boyko.

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Boyko, V., Richter, S., Pich, A. et al. Poly(N-vinylcaprolactam) microgels. Polymeric stabilization with poly(vinyl alcohol). Colloid Polym Sci 282, 127–132 (2003). https://doi.org/10.1007/s00396-003-0946-6

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  • DOI: https://doi.org/10.1007/s00396-003-0946-6

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