Transparent multiphasic polystyrene/epoxy blends
- Hoppe, Cristina Elena
- Galante, Maria Jose
- Oyanguren, Patricia Angelica
- Williams, Roberto Juan Jose
- Girard Reydet, E.
- Pascault, J.P.
DOIAbstract
Blends of polystyrene (PS) with an epoxy monomer (DGEBA) and a tertiary amine (BDMA), were initially miscible at 120°C but phase‐separated at very low conversions in the course of polymerization. Although there was a significant difference between the refractive indices of polystyrene and the DGEBA/BDMA solution, the refractive index of the epoxy network increased in the course of polymerization, attaining a value close to that of PS at complete conversion. A sharp decrease of the light transmittance was observed at the cloud‐point, observed at very low conversions. However, the continuous increase of the refractive index of the epoxy phase with conversion produced an approximate matching of both refractive indices, leading to transparent m...
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