Visible Light Photoinitiator for 3D-Printing of Tough Methacrylate Resins
| Autor: | Jürgen Stampfl, Robert Liska, Bernhard Steyrer, Philipp Neubauer |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
photopolymer
photoinitiator additive manufacturing digital light processing Materials science 02 engineering and technology 010402 general chemistry Methacrylate 01 natural sciences lcsh:Technology Article Ultimate tensile strength General Materials Science Composite material lcsh:Microscopy Lithography lcsh:QC120-168.85 lcsh:QH201-278.5 lcsh:T Dynamic mechanical analysis 021001 nanoscience & nanotechnology 0104 chemical sciences Photopolymer lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering 0210 nano-technology Glass transition lcsh:Engineering (General). Civil engineering (General) Photoinitiator lcsh:TK1-9971 Visible spectrum |
| Zdroj: | Materials, Vol 10, Iss 12, p 1445 (2017) Materials; Volume 10; Issue 12; Pages: 1445 Materials |
| ISSN: | 1996-1944 |
| Popis: | Lithography-based additive manufacturing was introduced in the 1980s, and is still the method of choice for printing accurate plastic parts with high surface quality. Recent progress in this field has made tough photopolymer resins and cheap LED light engines available. This study presents the influence of photoinitiator selection and post-processing on the thermomechanical properties of various tough photopolymers. The influence of three photoinitiators (Ivocerin, BAPO, and TPO-L) on the double-bond conversion and mechanical properties was investigated by mid infrared spectroscopy, dynamic mechanical analysis and tensile tests. It was found that 1.18 wt % TPO-L would provide the best overall results in terms of double-bond conversion and mechanical properties. A correlation between double-bond conversion, yield strength, and glass transition temperature was found. Elongation at break remained high after post-curing at about 80-100%, and was not influenced by higher photoinitiator concentration. Finally, functional parts with 41 MPa tensile strength, 82% elongation at break, and 112 °C glass transition temperature were printed on a 405 nm DLP (digital light processing) printer. |
| Databáze: | OpenAIRE |
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