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Stimuli-Responsive Mixed Grafted Polymer Films with Gradually Changing Properties : Direct Determination of Chemical Composition

Title data

Ionov, Leonid ; Sidorenko, Alexander ; Eichhorn, Klaus-Jochen ; Stamm, Manfred ; Minko, Sergiy ; Hinrichs, Karsten:
Stimuli-Responsive Mixed Grafted Polymer Films with Gradually Changing Properties : Direct Determination of Chemical Composition.
In: Langmuir. Vol. 21 (1 September 2005) Issue 19 . - pp. 8711-8716.
ISSN 1520-5827
DOI: https://doi.org/10.1021/la050620j

Abstract in another language

Infrared spectroscopic ellipsometry (IRSE) and visible monochromatic ellipsometry (VISE) approaches were applied to investigate the chemical structure and thickness of ultrathin polymer films. Mixed polystyrene−poly(2-vinylpyridine) and polystyrene−poly(tert-butyl acrylate) polymer grafted films (mixed brushes) with gradually changing composition (1D gradient mixed brush) along the sample were prepared on a temperature gradient stage via two subsequent “grafting to” reactions. The films were characterized by high-precision mapping VISE at a single wavelength (632.8 nm) and IRSE. The set of 1D IRSE spectra of the polymer brush films obtained by mapping the 1D gradient brush were used to estimate the thickness and the local composition of the film and to construct the 1D map of the film in terms of the chemical composition of the brush. The results were compared with the data obtained using monochromatic ellipsometry where the brush composition was estimated from the results of two subsequent measurements followed each grafting step. The measurements of the brush thickness and composition with both methods were found to be in gratifying agreement. The results demonstrate the high potential of IRSE methods for the one-step characterization (by thickness and chemical composition) of ultrathin polymer films of complex composition.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Professur Biofabrikation > Professur Biofabrikation - Univ.-Prof. Dr. Leonid Ionov
Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Professur Biofabrikation
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 22 Jun 2017 11:18
Last Modified: 22 Jun 2017 11:18
URI: https://eref.uni-bayreuth.de/id/eprint/37717