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Polymers 2019, 11(3), 445;

Time Resolved Polarised Grazing Incidence Neutron Scattering from Composite Materials

Department for Physics and Astronomy, Uppsala University, Lägerhyddsvägen 1, 752 37 Uppsala, Sweden
ANSTO, Sydney, Lucas Heights, NSW 2234, Australia
Author to whom correspondence should be addressed.
Current address: Institut de Physique de Rennes, Universitè de Rennes 1, 35042 Rennes CEDEX, France.
Received: 31 January 2019 / Revised: 27 February 2019 / Accepted: 4 March 2019 / Published: 7 March 2019
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Neutron scattering experiments are a unique tool in material science due to their sensitivity to light elements and magnetic induction. However, for kinetic studies the low brilliance at existing sources poses challenges. In the case of periodic excitations these challenges can be overcome by binning the scattering signal according to the excitation state of the sample. To advance into this direction we have performed polarised and time resolved grazing incidence neutron scattering measurements on an aqueous solution of the polymer F127 mixed with magnetic nano-particles. Magnetic nano-composites like this provide magnetically tuneable properties of the polymer crystal as well as magnetic meta-crystals. Even though the grazing incidence small angle scattering and polarised signals are too weak to be evaluated at this stage we demonstrate that such experiments are feasible. Moreover, we show that the intensity of the 111 Bragg peak of the fcc micellar crystal depends on the actual shear rate, with the signal being maximised when the shear rate is lowest (and vice-versa). View Full-Text
Keywords: GISANS; composite materials; rheology GISANS; composite materials; rheology

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Wolff, M.; Saini, A.; Simonne, D.; Adlmann, F.; Nelson, A. Time Resolved Polarised Grazing Incidence Neutron Scattering from Composite Materials. Polymers 2019, 11, 445.

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