Impact properties of acrylic denture base resin. 3. Impact properties of cross-linked polymers.

The impact properties in acrylic denture base resins cross-linked using 6 diacrylates, such as ethylene glycol dimethacrylate (EDMA) and rho-divinyl benzene (DVB), were investigated and discussed. In addition, the creep characteristics of these cross-linked resins were examined and related with their impact characteristics. From these results, it was seen that both characteristics deteriorated with an increase in the diacrylate concentration from 2 mol% to 10 mol%. On the other hand, an increase in the repeated number (n) of (--CH2--CH2--O--)n promoted a flexibility in the materials which resulted in a higher impact strength and toughness. But, there was no a significant difference in the resilience of these materials.