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

  • 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 mu m 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.

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Author details:Christina DiehlGND, Peter Cernoch, Ingrid Zenke, Heike Runge, Rona Pitschke, Juergen Hartmann, Brigitte TierschORCiD, Helmut SchlaadORCiDGND
URL:http://www.rsc.org/Publishing/Journals/sm/index.asp
DOI:https://doi.org/10.1039/C0sm00114g
ISSN:1744-683X
Publication type:Article
Language:English
Year of first publication:2010
Publication year:2010
Release date:2017/03/25
Source:Soft matter. - ISSN 1744-683X. - 6 (2010), 16, S. 3784 - 3788
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer review:Referiert
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