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URN: urn:nbn:de:kobv:517-opus-17176
URL: http://opus.kobv.de/ubp/volltexte/2008/1717/
Laschewsky, André ;
Ringsdorf, H.
Polymerization of amphiphilic dienes in Langmuir-Blodgett multilayers
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Dokument 1.pdf (774 KB) (SHA-1:48b0825cfcef62a051a8b684ed399dc5c2511a2b)
Kurzfassung in Englisch
Amphiphilic derivatives of octadiene and docosadiene were investigated in monolayers and Langmuir-Blodgett multilayers, with respect to their self-organization and their polymerization behavior. All amphiphiles investigated form monolayers. However, only acid and alcohol derivatives were able to build up multilayers. Those multilayers are rapidly photopolymerized in the layers via a two-step process: Irradiation with long-wavelength UV light yields soluble polymers, whereas additional irradiation with sfiort-wavelength
UV light produces insoluble and presumably cross-linked polymers. The reaction meclianism is discussed according to the polymer characterization by UV spectroscopy, small-angle X-ray scattering, NMR spectroscopy, and gel permeation chromatography. All multilayers undergo structural changes during the polymerization; substantial changes result in defects in the polymerized layers as observed by scanning electron microscopy.
In contrast to the acids and alcohols, the deposition of monolayers of the aldehyde derivatives did not yield well-ordered multilayers, but rather amorphous films. In this different film structure, the photopolymerization
process differs from the one observed in multilayers.
Institut 1:
Institut für Chemie
Institut 2:
Extern
DDC-Sachgruppe:
Chemie
Dokumentart:
c Postprint
Schriftenreihe:
Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, ISSN 1866-8372
Bandnummer:
paper 058
Quelle:
Macromolecules. - 21 (1988), 7, p. 1936 - 1941. - ISSN 0024-9297
Sprache:
Englisch
Erstellungsjahr:
1988
Publikationsdatum:
11.04.2008
Bemerkung:
first published in:
Macromolecules - 21 (1988), 7, p. 1936 - 1941
ISSN: 1520-5126
doi:10.1021/ma00185a010
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