Speaker
Mr
Lucas Kreuzer
(TU München, Physik-Department, Fachgebiet Physik weicher Materie/ Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching)
Description
Responsive polymers, especially in thin film morphology, are of great
interest for a wide variety of applications where a strong change of volume
is desired even for small changes of an external stimulus such
as temperature. In this context the most prominent representative
is poly(N isopropylacrylamide) (PNIPAM). We study a new block
copolymer which comprises a PNIPAM block and a poly(sulfobetaine)
(PSB) block. Thin films are prepared by spin coating on silicon substrates.
We have followed the swelling of such films in water vapor
atmosphere and found signature of H2O - D2O exchange in FT-IR
data. We use neutron reflectivity to study the swelling behavior and
the H2O - D2O exchange of PNIPAM-b-PSB films in more detail. In-situ
neutron reflectometry enables to follow the kinetics and determine
the underlying fundamental processes.
Primary author
Mr
Lucas Kreuzer
(TU München, Physik-Department, Fachgebiet Physik weicher Materie/ Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching)
Co-authors
Prof.
André Laschewsky
(Universität Potsdam, Institut für Chemie)
Prof.
Christine Papadakis
(Technische Universität München, E13)
Dr
Jean-Francois Moulin
(Helmholtz-Zentrum Geesthacht at Heinz Maier Leibnitz Zentrum)
Mrs
Kun Wang
(TU München, Physik-Department, E13)
Mr
Nuri Hohn
(TU München, Physik-Department, E13)
Prof.
Peter Müller-Buschbaum
(TU München, Physik-Department, E13)
Mr
Tobias Widmann
(TU München, Physik-Department, E13)
