Abstract
In this work, the cure kinetics and Theological properties of difunctional epoxy (diglycidylether of bisphenol A, DGEBA)/polysulfone (PSF) blends were investigated using differential scanning calorimeter and rheometer. From the DSC results of the blends, the temperature of the exothermic peak and cure activation energy (Ea) using a half-width method were increased with increasing the PSF content to neat epoxy resin up to 30 wt%. However, a marginal decrease in the blend system was shown in Ea. The conversion (a) and conversion rate (dα/dt) were decreased as the content of PSF increases. Rheological properties of the blend system were investigated under isothermal condition using a rheometer. Cross-linking activation energy (Ec) was determined from the Arrhenius equation based on gel time and curing temperature. As a result, the Ec showed a similar behavior with Ea, which could be resulted from high viscosity of PSF and the phase separation between DGEBA and PSF.
Original language | English |
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Pages (from-to) | 177-185 |
Number of pages | 9 |
Journal | Polymer (Korea) |
Volume | 25 |
Issue number | 2 |
State | Published - 2001 |
Externally published | Yes |
Keywords
- Cure kinetics
- Difunctional epoxy
- Polysulfone
- Rheological properties