Refine
H-BRS Bibliography
- yes (8)
Departments, institutes and facilities
Document Type
- Article (8) (remove)
Keywords
- Ion viscosity (2)
- Complex modulus (1)
- Curing behavior (1)
- Curing kinetics (1)
- Degree of conversion (1)
- Dental composites (1)
- Dental resin (1)
- Depth Of Cure (1)
- Dielectric analysis (1)
- Dielectric analysis (DEA) (1)
- Dynamic mechanical analysis (1)
- FTIR (1)
- Filler content (1)
- Hardness mapping (1)
- Irradiance Distribution (1)
- Irradiance distribution (1)
- Knoop micro-hardness (1)
- Laser-Beam Profiler (1)
- Light Curing Units (1)
- Light curing units (1)
- Local mechanical properties (1)
- Microindentation (1)
- Resin based composite (1)
- Rheology (1)
- Shear viscosity (1)
- Single Lens Reflex Camera (1)
- Static stiffness (1)
- Visible light curing (1)
- Visible light curing resin (1)
- iPad (1)
This study presents a microindentation system which allows spatially resolved local as well as bulk viscoelastic material information to be obtained within one instrument. The microindentation method was merged with dynamic mechanical analysis (DMA) for a tungsten cone indenter. Three tungsten cone indenters were investigated: tungsten electrode, tungsten electrode + 2% lanthanum, and tungsten electrode + rare earth elements. Only the tungsten electrode + 2% lanthanum indenter showed the sinusoidal response, and its geometry remained unaffected by the repeated indentations. Complex moduli obtained from dynamic microindentation for high-density polyethylene, polybutylene terephthalate, polycarbonate, and thermoplastic polyurethane are in agreement with the literature. Additionally, by implementing a specially developed x-y-stage, this study showed that dynamic microindentation with a tungsten cone indenter was an adequate method to determine spatially resolved local viscoelastic surface properties.