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Issue 16, 2010
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Mechanistic study of the phase separation/crystallization process of poly(2-isopropyl-2-oxazoline) in hot water

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Abstract

The kinetics of the crystallization of thermoresponsive poly(2-isopropyl-2-oxazoline) in water and the time-dependent evolution of the morphology were examined using wide-angle X-ray scattering and conventional and cryogenic scanning electron microscopy. Results indicate that a temperature-induced phase separation produces a bicontinuous polymer network-like structure, which with the onset of crystallization collapses into individual particles (1–2 µm in diameter) composed of a porous fiber mesh. Nanofibers then preferentially form at the particle surface, thus wrapping the microspheres like a ball of wool. The particle morphology is severely affected by changes in temperature and less by the initial polymer concentration.

Graphical abstract: Mechanistic study of the phase separation/crystallization process of poly(2-isopropyl-2-oxazoline) in hot water

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Publication details

The article was received on 16 Mar 2010, accepted on 22 May 2010 and first published on 16 Jun 2010


Article type: Paper
DOI: 10.1039/C0SM00114G
Citation: Soft Matter, 2010,6, 3784-3788
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    Mechanistic study of the phase separation/crystallization process of poly(2-isopropyl-2-oxazoline) in hot water

    C. Diehl, P. Černoch, I. Zenke, H. Runge, R. Pitschke, J. Hartmann, B. Tiersch and H. Schlaad, Soft Matter, 2010, 6, 3784
    DOI: 10.1039/C0SM00114G

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