By combining recent advancements in high viscosity piezo inkjet and measurement technique for high frequency rheology, we investigate a route to multi-material printing of highly viscous UV polymers that were developed for vat photo polymerization. The targeted application is additive manufacturing of dental prosthesis where a single-material process (vat photo polymerization) shall be replaced by a multi-material process (inkjet printing) without compromising the material properties of the prosthesis. We study the printability of UV-polymers from two manufacturers with the recently introduced printhead from Quantica (a prototype). At temperatures of 60°C-70° C the viscosity and Ohnesorge number lie in a printable range. The integrity of the UV-polymers at elevated temperatures is tested. The (linear) visco-elasticity is studied by vibrational rheology in a frequency range up to 10kHz and a viscoelastic model (Maxwell-Wiechert model) of the materials is fitted to the data.
