Phase separation in a poly(ether sulfone) modified epoxy-amine system studied by temperature modulated differential scanning calorimetry and dielectric relaxation spectroscopy |
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| Authors: | S Montserrat F Roman M Basany P Colomer |
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| Institution: | Departament de Màquines i Motors Tèrmics, E.T.S. d'Enginyeria Industrial de Terrassa, Universitat Politècnica de Catalunya, 08222-Terrassa, Spain |
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| Abstract: | The phase separation induced by the curing reaction of an epoxy based on diglycidylether of bisphenol A (DGEBA) with methylene dianiline (MDA) modified with poly(ether sulfone) (PES) at a concentration of 20 wt% was studied by temperature modulated differential scanning calorimetry (TMDSC) and dielectric relaxation spectroscopy (DRS). The effect of phase separation on the curing kinetics and vitrification phenomena is analysed. The dependence of the log of the measuring frequency on the degree of conversion allows the correlation between the dipolar relaxation of each phase and the vitrification observed by TMDSC to be established. |
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| Keywords: | dielectric properties kinetics phase separation temperature modulated DSC vitrification |
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