RT Journal Article
T1 Effect of polysulfone brush functionalization on thermo-mechanical properties of melt extruded graphene/polysulfone nanocomposites
A1 Peña Bahamonde, Janire
A1 San Miguel Arnanz, Verónica
A1 Baselga Llidó, Juan
A1 Fernández Blázquez, Juan Pedro
A1 Gedler, Gabriel
A1 Ozisik, Rahmi
A1 Cabanelas Valcárcel, Juan Carlos
AB The current work reports the preparation of nanocomposites of polysulfone (PSU) reinforced with reduced graphene oxide (rGO) by a solvent-free extrusion-injection method. In order to improve nanofiller dispersation, rGO was covalently grafted with PSU brushes via click chemistry. Several rGO/PSU nanocomposites with concentrations up to 3% (by weight) were prepared with both unmodified and PSU-grafted rGO. Morphology of the rGO/PSU nanocomposites were characterized via FE-SEM and TEM, which revealed a better dispersion state when rGO was grafted with PSU. Thermo-mechanical characterization of the rGO/PSU which improved the overall mechanical properties compared to unmodified rGO/PSU composites. An increase in the glass transition temperature () of the PSU matrix was also observed. Nanocomposites did not reach complete rheological percolation, therefore, the results have been explained in terms of the entanglement of grafted and matrix PSU chains leading to improved interphase effects. The presence of grafted polymer chains also increased the sliding capacity favoring the sample deformation with subsequent toughness improvement. The proposed solvent-free extrusion-injection method is easily scalable and enables the potential uses of rGO/PSU nanocomposites.
PB Elsevier
SN 0008-6223
YR 2019
FD 2019-10-01
LK https://hdl.handle.net/10016/39626
UL https://hdl.handle.net/10016/39626
LA eng
NO This work was financially supported by the Spanish Ministry of Economy and Competitiveness (MAT2014-57557-R). Janire Peña wants to acknowledge mobility grant from Carlos III University and Instituto Tecnológico de Química y Materiales “Alonso Barba”. Rahmi Ozisik would like to acknowledge support from the National Science Foundationn under Grant CMMI-1538730.
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