Thermal stability and curing behavior of acrylate photopolymers for additive manufacturing

• DOI: 10.1002/pen.26355
• Publication Date: 2023-05-22T13:30:03Z
• Authors: Robert Setter; Stefan Schmölzer; Natalie Rudolph; Elena Moukhina; Katrin Wudy
• Keywords: Isothermal process; Thermogravimetric analysis; Thermal Stability

Abstract Next‐generation additive manufacturing processes based on UV‐curing acrylate photopolymers extend the barriers of functional part production by deploying rapid processing speeds, complex geometries with high resolutions, and an extended material spectrum. Many technologies introduce temperature‐dependent curing decomposition behavior acrylates to list process‐related challenges. This investigation targets a comprehensive analysis thermal stability acrylic implementing analyzing techniques like thermogravimetric analysis, Fourier‐transform infrared spectroscopy, differential scanning calorimetry. Significant parameters such as UV intensity isothermal temperature are varied design experiments. Characteristic evolving gases at elevated temperatures identified discussed towards their relevance for process. The calorimetric results demonstrate increasing reaction speeds intensities well restricted accelerating effect temperatures. enthalpy proves be strongly dependent chosen temperature. represent base comparison different kinetic models in future investigations.