Probing the glass transition in polymers using LF muSR

DOI

Nearly all polymers form glasses and the glass transition at temperature Tg dominates many physical properties of polymers that are relevant for their applications. The most detailed previous muon studies of polymer glasses have been made in TF mode using diamagnetic muon probe states. This works particularly well in low Tg systems for probing Tg near the surface of thin films using low energy muons. If Tg approaches or exceeds room temperature then fast diffusion of unbound diamagnetic muons forces a switch to bound paramagnetic muon probe states. LF muSR techniques will be developed here for polymer glass studies using the relaxation of the paramagnetic muons at both low LF and at ALC resonance points to probe the dynamical state of the polymer. The studies will focus on two polymers, the biocompatible polymer poly(L-lactide) (Tg=335K) and the low Tg polymer polybutadiene (Tg=170K)

Identifier
DOI https://doi.org/10.5286/ISIS.E.87814531
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/87814531
Provenance
Creator Professor Tom Lancaster; Professor Stephen Blundell; Dr Francis Pratt; Dr Leandro Liborio; Dr Stephen Cottrell; Dr Ben Huddart; Dr Matteo Aramini
Publisher ISIS Neutron and Muon Source
Publication Year 2020
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 Natural Sciences; Physics
Temporal Coverage Begin 2017-10-23T08:00:00Z
Temporal Coverage End 2017-10-27T08:46:18Z