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Combined dielectric spectroscopy and neutron scattering study of a polymer blend as a simplified industrial system

AuthorsGambino, Thomas; Alegría, Ángel ; Arbe, Arantxa ; Colmenero de León, Juan ; Malicki, Nicolas; Dronet, Séverin; Schnell, Benoît; Lohstroh, Wiebke; Nemkovski, Kirill
Issue Date2018
Citation10th Conference on Broadband Dielectric Spectroscopy and its Applications (2018)
AbstractIn this work we apply the methodology and concepts developed over the last years for the study of segmental dynamics on athermal miscible polymer blends to the investigation of a blend made of styrene-butadiene rubber (SBR) and an oligomer of polystyrene (PS), as an example of simplified industrial system. In this way we obtain detailed information about the segmental dynamics of both components within the blend. To this end, a judicious combination of broad-band dielectric spectroscopy (BDS) and quasi-elastic neutron scattering (QENS) results on partially deuterated blends was required. Difficulties on the comparison between isotopically different samples arose due to the uncontrolled changes in polymer microstructure associated with the obtention of deuterated polymers. Nevertheless, the strategy for data analysis developed in this work made it possible to readily resolve the component’s segmental dynamics of the investigated mixtures. It was found that gaussian distributions of the component’s effective glass-transition temperatures provide a very good description of all the experimental data collected in the SBR/PS (50/50 wt%) mixtures over the whole accessible temperature range, not only by BDS and QENS but also those obtained by differential scanning calorimetry (DSC) and by neutron elastic-fixed-window-scans (EFWS) experiments.
DescriptionResumen del trabajo presentado a la 10th Conference on Broadband Dielectric Spectroscopy and its Applications (BDS) celebrada en Bruselas (Belgica) del 26 al 31 de agosto de 2018.
Appears in Collections:(CFMAC) Comunicaciones congresos
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