Pressure-Dependence of the Formation of Poly(N-isopropyl acrylamide) Mesoglobules above the Cloud Point

15 May 2019, 19:00
3h
Institute of Advanced Study (TUM Campus Garching)

Institute of Advanced Study

TUM Campus Garching

Lichtenbergstraße 2a, 85748 Garching

Speaker

Dr Geethu P. Meledam (TU München, Physik-Department, Garching, Germany)

Description

Influence of pressure on the formation of mesoglobules of the thermoresponsive polymer poly(N-isopropyl acrylamide) (PNIPAM) in aqueous solution, when heated above its cloud point is investigated using very small angle neutron scattering. At a critical pressure, a remarkable increase in the size of PNIPAM mesoglobules is noted. We presume that the observed increase in the size of mesoglobules is due to the pressure induced enhancement in hydration and subsequent aggregation of mesoglobules.

Primary authors

Dr Geethu P. Meledam (TU München, Physik-Department, Garching, Germany) Bart-Jan Niebuur (TU München, Physik weicher Materie) Vitaliy Pipich Dr Marie-Sousai APPAVOU (Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH) Alfons Schulte (University of Central Florida) Christine Papadakis (Technische Universität München, Physik-Department, Fachgebiet Physik weicher Materie)

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