Kinetics of Jammed Systems: PNIPA gles

Erik Geissler (1) , Krisztina Laszlo (2) , Andrei Fluerasu (3) , Abdellatif Moussaid (3)

1 LIPhy - Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères]
2 Department of Physical Chemistry and Materials Science
3 ESRF - European Synchrotron Radiation Facility

In the out-of-equilibrium state above the volume phase transition temperature, poly(N-isopropyl acrylamide) hydrogels deswell non-diffusively, relaxing instead by a hyperdiffusive mechanism as in jammed systems. X-ray photon correlation spectroscopy is employed to show that the unconventional relaxation properties (linear dependence of the intensity correlation function both on time and on transfer wave vector) are the consequence of uniform deswelling.

Mots clés: hydrogels; relaxation; small angle X-ray scattering (SAXS); stimuli-sensitive

Domaines: Chimie-Physique [physics.chem-ph]

Erik Geissler, Krisztina Laszlo, Andrei Fluerasu, Abdellatif Moussaid. Kinetics of Jammed Systems: PNIPA gles. Macromolecular Symposia, 2011, 306-307, pp.27-32. ⟨10.1002/masy.20100014⟩. ⟨hal-00634660⟩