1. Characterization of Ultraviolet-Cured Methacrylate Networks: From Photopolymerization to Ultimate Mechanical Properties
- Author
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W. Peerbooms, Rosaria Anastasio, Ruth Cardinaels, L.C.A. van Breemen, and Processing and Performance
- Subjects
Materials science ,Polymers and Plastics ,Organic Chemistry ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Methacrylate ,01 natural sciences ,Article ,0104 chemical sciences ,law.invention ,Characterization (materials science) ,Inorganic Chemistry ,Stress (mechanics) ,Light intensity ,Photopolymer ,law ,Ultimate tensile strength ,Materials Chemistry ,Composite material ,0210 nano-technology ,Material properties ,Stereolithography - Abstract
In this study, the effect of different process conditions on the material properties of a single UV-cured layer of methacrylate resin, typically used in the stereolithography (SLA) process, is assessed. This simplified approach of the SLA process gives the opportunity to study the link between process conditions and mechanical properties without complicated interactions between different layers. Fourier-transform infrared analysis is performed to study the effect of light intensity, curing time, and initiator concentration on the monomer conversion. A model is developed based on the reaction kinetics of photopolymerization that describes and predicts the experimental data. The effect of curing time and light intensity on the glass-transition temperature is studied. A unique relation exists between conversion and glass-transition temperature, independent of the light intensity and curing time. Tensile tests on UV-cured resin show an increase in yield stress with increasing curing time and a linear relation between glass-transition temperature and yield stress. However, a lower light intensity leads to a different network structure characterized by a lower yield stress and glass-transition temperature. The correlations between process conditions and the mechanical properties of UV-cured methacrylate systems are established to better understand the role of the processing parameters involved in the SLA process. ispartof: Macromolecules vol:52 issue:23 pages:9220-9231 ispartof: location:United States status: published
- Published
- 2019