In this study, photo-curing kinetics for urethane-acrylate-based photo-inks for 3D printing were evaluated using a photo-differential scanning calorimetry analysis. Initially, the photopolymerization kinetics of di- and monofunctional monomers were separately studied at different temperatures (5-85 °C). Later, the photo-curing kinetics and mechanical properties of photo-inks based on different monomer mixtures (40/60-20/80) were evaluated. The results showed that urethane-dimethacrylate (UrDMA) and urethane-acrylate (UrA) had no light absorption in the region of 280-700 nm, making them a proper crosslinker and a reactive diluent, respectively, for the formulation of 3D-printing photo-inks. The kinetics investigations showed a temperature dependency for the photo-curing of UrDMA, where a higher photopolymerization rate (: from 5.25 × 10 to 8.42 × 10 1/s) and double-bound conversion (: from 63.8% to 92.2%) were observed at elevated temperatures (5-85 °C), while the photo-curing of UrA was independent of the temperature (25-85 °C). Enhancing the UrA content from 60% to 80% in the UrDMA/UrA mixtures initially increased and later decreased the photopolymerization rate and conversion, where the mixtures of 30/70 and 25/75 presented the highest values. Meanwhile, increasing the UrA content led to lower glass transition temperatures () and mechanical strength for the photo-cured samples, where the mixture of 30/70 presented the highest maximum elongation (: 73%).
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9331891 | PMC |
| http://dx.doi.org/10.3390/polym14152974 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Engineering Nano/Microscale Chiral Self-Assembly in 3D Printed Constructs.
Nanomicro Lett
December 2023
Department of Chemical Engineering, University of South Carolina, Columbia, SC, 29208, USA.
Helical hierarchy found in biomolecules like cellulose, chitin, and collagen underpins the remarkable mechanical strength and vibrant colors observed in living organisms. This study advances the integration of helical/chiral assembly and 3D printing technology, providing precise spatial control over chiral nano/microstructures of rod-shaped colloidal nanoparticles in intricate geometries. We designed reactive chiral inks based on cellulose nanocrystal (CNC) suspensions and acrylamide monomers, enabling the chiral assembly at nano/microscale, beyond the resolution seen in printed materials.
View Article and Find Full Text PDFPhoto-Curing Kinetics of 3D-Printing Photo-Inks Based on Urethane-Acrylates.
Polymers (Basel)
July 2022
Department of Life Science and Bioprocesses, Fraunhofer Institute for Applied Polymer Research IAP, Geiselbergstraße 69, 14476 Potsdam, Germany.
In this study, photo-curing kinetics for urethane-acrylate-based photo-inks for 3D printing were evaluated using a photo-differential scanning calorimetry analysis. Initially, the photopolymerization kinetics of di- and monofunctional monomers were separately studied at different temperatures (5-85 °C). Later, the photo-curing kinetics and mechanical properties of photo-inks based on different monomer mixtures (40/60-20/80) were evaluated.
View Article and Find Full Text PDFPhotocurable Coatings Based on Bio-Renewable Oligomers and Monomers.
Materials (Basel)
December 2021
Department of Organic Chemical Technology and Polymer Materials, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Pułaskiego Ave. 10, 70-322 Szczecin, Poland.
Due to long-term problems related to environmental protection, economic aspects, and waste management in the chemical industry, it is justified to develop renewable polymers as an alternative to synthetic polymers. Two kinds of acrylic bio-renewable components were used for the modification of acrylated epoxidized soybean oil (AESO). The bio-based compositions used as photocurable binders to obtain the photocurable coatings with satisfactory properties and high bio content were then prepared.
View Article and Find Full Text PDFPoly(2-allylamidopropyl-2-oxazoline)-Based Hydrogels: From Accelerated Gelation Kinetics to Compatibility in a Murine Subdermal Implant Model.
Biomacromolecules
April 2021
Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium.
A rapid photo-curing system based on poly(2-ethyl-2-oxazoline--2-allylamidopropyl-2-oxazoline) and its compatibility are presented. The base polymer was synthesized from the copolymerization of 2-ethyl-2-oxazoline (EtOx) and the methyl ester containing 2-methoxycarboxypropyl-2-oxazoline (CMestOx) followed by amidation with allylamine to yield a highly water-soluble macromer. We showed that spherical hydrogels can be obtained by a simple water-in-oil gelation method using thiol-ene coupling and investigated the biocompatibility of these hydrogel spheres in a 28-day murine subdermal model.
View Article and Find Full Text PDFShort-time dental resin biostability and kinetics of enzymatic degradation.
Acta Biomater
July 2018
Volpe Research Center, American Dental Association Foundation, Gaithersburg, MD 20899, USA. Electronic address:
Unlabelled: Resin biostability is of critical importance to the durability of methacrylate-based dental resin restorations. Current methods for evaluating biostability take considerable time, from weeks to months, and provide no short-time kinetics of resin degradation. The objective of this study is to develop a more sensitive method to assess resin biostability over short-time spans (hours to days) that will enhance our understanding of biostability and its resin chemistry.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!