In the current study, characterizations on linear viscoelastic properties and on large scale deformation mechanical tensile behaviors are performed on three polyethylene (PE) grades with different network architectures: HDPE (thermoplastic), PE-vitrimer and PEX (thermoset). It aims to compare different materials of various natures in the same physi...
Research on bio-based covalent adaptable networks is popular nowadays in the search for an optimal implementation of thermoset materials and composites in a circular context. Herein, a vanillin derivative is integrated into vitrimers with promising material properties in which the vinylogous urethane associative chemistry has been used as a dynamic...
The main objective of this work is to analyze finely the influence of cross-linking on the mechanical properties of PBT (Polybutylene Terephtalate)-based vitrimers. Tensile tests were carried out at four temperatures (80°C, 100°C, 130°C and 160°C) on a series of vitrimer specimens made by injection molding for which the cross-linker concentrations ...
In this research, the synthesis and application of vitrimer epoxy coatings for long-term corrosion protection of metal surfaces are described. To that end, a polyamine curing agent based on vinylogous urethanes (VUs) was developed to add repairability, recyclability and recoatability to thermosetting materials. Thin films with excellent resistance ...
Dynamic covalent polymer networks provide an interesting solution to the challenging recyclability of thermosets and elastomers. One of the remaining design constraints, however, is balancing thermal reprocessability in the form of material flow with dimensional stability during use. As a result, many chemistries are being investigated in order to ...
In this research, the synthesis and application of vitrimer epoxy coatings for long-term corrosion protection of metal surfaces are described. To that end, a polyamine curing agent based on vinylogous urethanes (VUs) was developed to add repairability, recyclability and recoatability to thermosetting materials. Thin films with excellent resistance ...
We report a straightforward chemical strategy to tackle current challenges of irreversible deformation in low T-g vitrimers at operating temperature. In particular, vinylogous urethane (VU) vitrimers were prepared where reactive free amines, necessary for material flow, were temporarily shielded inside the network backbone, by adding a small amount...
Dual dynamic networks (DDNs) are polymeric materials that combine two (or more) distinct crosslinkers in one system. By coupling different crosslinking strategies, precisely tailored materials can be designed. This thesis explores the implementation of the vitrimer concept into DDNs. Elastomeric vitrimers consisting of two interpenetrated dynamic n...
Vitrimers constitute a fascinating class of polymer materials that make the link between the historically opposed 3D networks (thermosets) and linear polymers (thermoplastics). Their chemical resistance, reshaping ability, and unique rheological behavior upon heating make them promising for future applications in industry. However, many vitrimers r...
Rubbers are usually cross-linked through static covalent bonds. Consequently, they cannot be reshaped after their synthesis. With the aim to extend the shelf life of elastomers, dynamic covalent chemistry was used to cross-link elastomers and develop recyclable rubbers. Thanks to the associative exchange reaction between boronic ester cross-links, ...
