Eur. Phys. J. E 2, 145-151
Orientation of grafted polymer chains at the air-water interface studied by PM-IRRAS
M.C. Fauré1 - P. Bassereau1 - B. Desbat2
1 Laboratoire Physico Chimie Curie, Institut Curie, 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France
2 Laboratoire de Physico-Chimie Moléculaire, Université de Bordeaux I, 33405
Talence, France
patricia.bassereau@curie.fr
Received 16 April 1999 and Received in final form 26 August 1999
Abstract
Monolayers of polystyrene-polyethylene oxide (PS-PEO)
copolymers at the air-water interface have been studied with the
Modulation Polarization Infra Red Spectroscopy technique
(PM-IRRAS) to measure the orientation of the PEO chains with
respect to the normal to the interface. At surface densities
intermediate between the dilute regime and the brush regime, the
average tilt angle has been determined: it decreases continuously
with the surface density in the monolayer, in good agreement with
previous results (M.C. Fauré et al., Macromolecules 32, 8538 (1999)).
The further stretching of the
molecules in the brush regime has also been measured. No
substantial volume fraction of PEO crystal domains has been
detected in the very dense regime
PACS
82.65.Dp Thermodynamics of surfaces and interfaces -
82.80.Ch Ultraviolet, visible, infrared, Raman, microwave, and
magnetic resonance spectroscopic analysis methods; spectrophotometry; colorimetry
Copyright EDP Sciences, Società Italiana di Fisica, Springer-Verlag
