Critical analysis of the thermal stability of transesterification vitrimers for 3D-printing applications based on digital light processing
3D-printable vitrimers processed by digital light processing (DLP) have been recently developed, based on the transesterification reaction of ß-hydroxyester structures from mono- and diacrylate monomers employed in the formulation. These materials show promising repairability and recyclability, in a...
| Authors: | , , , , , , |
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| Format: | article |
| Publication Date: | 2023 |
| Country: | España |
| Institution: | Universitat Politècnica de Catalunya (UPC) |
| Repository: | UPCommons. Portal del coneixement obert de la UPC |
| Language: | English |
| OAI Identifier: | oai:upcommons.upc.edu:2117/397872 |
| Online Access: | https://hdl.handle.net/2117/397872 https://dx.doi.org/10.1002/pi.6592 |
| Access Level: | Open access |
| Keyword: | Materials science Three-dimensional printing Polymers 3D-printing Vitrimer Digital light processing (DLP) Thermal stability Relaxation dynamics Ciència dels materials Impressió 3D Polímers Àrees temàtiques de la UPC::Enginyeria dels materials |
| Summary: | 3D-printable vitrimers processed by digital light processing (DLP) have been recently developed, based on the transesterification reaction of ß-hydroxyester structures from mono- and diacrylate monomers employed in the formulation. These materials show promising repairability and recyclability, in addition to other interesting features such as shape memory and shape reconfigurability. It has been reported that structural changes taking place due to transesterification promote network rearrangement and an enhancement of the thermomechanical properties. However, the elevated temperatures required for the network reconfiguration cast some doubts on their applicability in real-life scenarios. In this paper, we analyze the effect of the thermal treatment on the thermomechanical properties and relaxation behavior of these materials and discuss the underlying mechanism explaining the observed changes. We identify some critical issues related to use of a monoacrylate containing ß-hydroxyester moieties, and propose solutions to overcome the most relevant drawbacks. |
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