6533b86cfe1ef96bd12c8a81

RESEARCH PRODUCT

Structural investigation of e-beam cured epoxy resins through solid state NMR

Clelia DispenzaAlberto SpinellaGiuseppe SpadaroEugenio CaponettiSabina Alessi

subject

RadiationMaterials scienceEpoxy resin E-beam curing Network structure Dynamic-mechanical–thermal analysis Solid statenuclearmagneticresonanceEpoxyDynamic mechanical analysisSolid-state nuclear magnetic resonancevisual_artPolymer chemistryvisual_art.visual_art_mediumElectron beam processingMoleculeReactivity (chemistry)Composite materialThermal analysisSpectroscopy

description

Abstract In this paper the network structure of e-beam cured DGEBF based epoxy resins is investigated. Two epoxy systems, having different reactivity and cured in different process conditions, were analyzed through solid state NMR spectroscopy. The analysis shows that the more reactive system has higher cross-linking density and higher uniformity of network distribution. Similar information were obtained, in a previous work, on the same systems through dynamic mechanical thermal analysis. It is worth noting that unlike DMTA tests, which interfere with the molecular structure of the analyzed material, due to the heating during the analysis itself, more reliable information, without any artefact, are obtained by solid state NMR, carried out at constant room temperature.

yearjournalcountryeditionlanguage
2012-09-01Radiation Physics and Chemistry
https://doi.org/10.1016/j.radphyschem.2011.12.004