Next Article in Journal
An Easy-Made, Economical and Efficient Carbon-Doped Amorphous TiO2 Photocatalyst Obtained by Microwave Assisted Synthesis for the Degradation of Rhodamine B
Next Article in Special Issue
Effects of T2 Heat Treatment on Microstructure and Properties of the Selective Laser Melted Aluminum Alloy Samples
Previous Article in Journal
Micro-Arc Oxidation Enhances the Blood Compatibility of Ultrafine-Grained Pure Titanium
Previous Article in Special Issue
Ceramic-Based 4D Components: Additive Manufacturing (AM) of Ceramic-Based Functionally Graded Materials (FGM) by Thermoplastic 3D Printing (T3DP)
Open AccessArticle

Visible Light Photoinitiator for 3D-Printing of Tough Methacrylate Resins

Institute of Materials Science and Technology, TU Wien, 1060 Wien, Austria
Institute of Applied Synthetic Chemistry, TU Wien, 1060 Wien, Austria
Author to whom correspondence should be addressed.
Materials 2017, 10(12), 1445;
Received: 28 November 2017 / Revised: 17 December 2017 / Accepted: 18 December 2017 / Published: 19 December 2017
(This article belongs to the Special Issue NextGen Materials for 3D Printing)
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. View Full-Text
Keywords: photopolymer; photoinitiator; additive manufacturing; digital light processing photopolymer; photoinitiator; additive manufacturing; digital light processing
Show Figures

Graphical abstract

MDPI and ACS Style

Steyrer, B.; Neubauer, P.; Liska, R.; Stampfl, J. Visible Light Photoinitiator for 3D-Printing of Tough Methacrylate Resins. Materials 2017, 10, 1445.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop