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Reversible bond formation via sulfur free reversible addition fragmentation in photo-3D printing
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Wan, Zhongyuan, Wai Hin, Lee, Shegiwal, Ataulla and Haddleton, David M. (2023) Reversible bond formation via sulfur free reversible addition fragmentation in photo-3D printing. European Polymer Journal, 196 . 112324. doi:10.1016/j.eurpolymj.2023.112324 ISSN 0014-3057.
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Official URL: http://doi.org/10.1016/j.eurpolymj.2023.112324
Abstract
An addition-fragmentation monomer (AFM) has been used as a crosslinker in photopolymerization-based 3D printer resins in order to try and reduce shrinkage due to polymerisation. This results in reversible network formation via photo crosslinking with reversible covalent bond formation to effect mechanical performance. The 3D printing conditions were optimized with regards to print quality, print speed, etc. The AFM was synthesized via catalytic chain transfer polymerization (CCTP) and characterized using NMR and size exclusion chromatography (SEC). The incorporation of the AFM as a crosslinker allows for rapid reversible covalent bond formation during network formation in 3D photopolymerization printing resulting in a reduction in both polymerisation shrinkage and stress higher molecular weight crosslinkers lead to less shrinkage and reversible bond formation to less stress build up. Curing was monitored via photo-rheology and Fourier Transform Infrared Spectroscopy (FT-IR). At lower contents of AFM, the mechanical properties (strength and Young’s modulus) are improved without compromising material properties, printing conditions and curing time. At higher AFM content, the kinetic analysis of the photopolymerization reaction shows a reduced final conversion of the vinylic bonds along with a delay of the gel point. The thermal and mechanical properties were evaluated with incorporation of different concentrations of AFM added to the resin formulations.
Item Type: | Journal Article | |||||||||
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Subjects: | Q Science > QD Chemistry T Technology > TS Manufactures |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | |||||||||
Library of Congress Subject Headings (LCSH): | Polymers, Addition polymerization, Photopolymerization , Three-dimensional printing, Chromatographic analysis, Gel permeation chromatography, Fourier transform infrared spectroscopy | |||||||||
Journal or Publication Title: | European Polymer Journal | |||||||||
Publisher: | Pergamon | |||||||||
ISSN: | 0014-3057 | |||||||||
Official Date: | 11 September 2023 | |||||||||
Dates: |
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Volume: | 196 | |||||||||
Article Number: | 112324 | |||||||||
DOI: | 10.1016/j.eurpolymj.2023.112324 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||
Date of first compliant deposit: | 19 September 2023 | |||||||||
Date of first compliant Open Access: | 20 September 2023 | |||||||||
RIOXX Funder/Project Grant: |
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