6533b859fe1ef96bd12b837f

RESEARCH PRODUCT

Study of the Curing Process of DGEBA Epoxy Resin Through Structural Investigation

Alberto SpinellaEugenio CaponettiSabina AlessiMeshude AkbulutOlgun GüvenGiuseppe Spadaro

subject

Bisphenol AMaterials scienceDiglycidyl etherEpoxy resins solid-state nuclear magnetic resonance (ss-NMR) positron annihilation lifetime spectroscopy (PALS)Polymers and PlasticsOrganic ChemistryEpoxyDynamic mechanical analysisCondensed Matter Physicschemistry.chemical_compoundMonomerDifferential scanning calorimetrychemistrySolid-state nuclear magnetic resonancevisual_artPolymer chemistryMaterials Chemistryvisual_art.visual_art_mediumSettore CHIM/07 - Fondamenti Chimici Delle TecnologiePhysical and Theoretical ChemistryThermal analysis

description

In this work, a multi-scale approach with different analytical methods is applied to study the curing process and the structural properties of a diglycidyl ether of bisphenol A (DGEBA) epoxy resin. This monomer, thermally cured using 4,4′-diaminodiphenilsulfone (DDS) as hardener, is analyzed after 10, 45, 90, and 120 min of reaction time at 180 °C to obtain information on samples with different cross-linking densities. Samples are also characterized after extraction in acetone in order to obtain structural information on the insoluble parts. For this purpose, differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), solid-state nuclear magnetic resonance (ss-NMR), and positron annihilation lifetime spectroscopy (PALS) are employed. The importance of this multi-method approach lies in the possibility to obtain a more complete knowledge of the investigated system, overcoming the limits inherent to the use of a single technique, through the correlation among results obtained from different structural investigation methodologies.

yearjournalcountryeditionlanguage
2015-01-19
10.1002/macp.201400510http://hdl.handle.net/10447/106727