Molecular Dynamics in Polystyrene

DOI

The goal of this experiment is to better understand the molecular dynamics in polystyrene in order to shed light on the discrepancy between beta-NMR and low-energy muSR experiments on the depth dependence of enhanced dynamics near a free surface. We propose to measure the temperature dependence of the muon relaxation in a weak transverse field (1/T2), which we believe will be more sensitive to probing the molecular dynamics than measurement of the muon relaxation in longitudinal field. The temperature dependence of 1/T2 will allow us to determine the parameters for torsional motion of the phenyl rings and will be compared with the results of beta-NMR and neutron scattering experiments. The results of the proposed experiment will allow us to submit a proposal to PSI to remeasure the depth dependence of enhanced dynamics in polystyrene on LEM and resolve the controversy.

Identifier
DOI https://doi.org/10.5286/ISIS.E.83549846
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/83549846
Provenance
Creator Dr Iain McKenzie; Dr Stephen Cottrell
Publisher ISIS Neutron and Muon Source
Publication Year 2019
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Chemistry; Natural Sciences
Temporal Coverage Begin 2016-12-10T09:00:00Z
Temporal Coverage End 2016-12-12T09:00:00Z