High-performance polyimine vitrimers from an aromatic bio-based scaffold

Abstract

This works reports on novel polyimine vitrimers from a bio-based and fully aromatic scaffold. The dynamic networks possess high-performance thermal stability and charring behavior with facile thermomechanical and viscoelastic tunability.

Solvent-free preparation of imine vitrimers: leveraging benzoxazine crosslinking for melt processability and tunable mechanical performance

“…The observed creep performance of the p(iBOX) networks at elevated temperatures was comparable to similar imine vitrimers prepared through solution casting approaches, demonstrating the ability of orthogonal benzoxazine crosslinking to achieve dynamic imine networks with similar material properties. 38,79 Malleability, reprocessing & self-healing…”

“…These limitations prevent the direct, melt-state synthesis of imine networks and oen necessitate solution-casting techniques using harsh solvents and lengthy drying procedures to produce vitrimer lms. 37,38 To overcome these constraints, researchers have explored orthogonal reactions that enable network formation through alternative polymerization mechanisms. [39][40][41] For example, Stouten et al developed imine-containing acrylate monomers which could undergo bulk photopolymerization and additive manufacturing to prepare void-free complex parts.…”

Hybrid Dynamic Covalent Network-Based Protecting Layer for Stable Li-Metal Batteries

“…Thanks to the rapid development of dynamic covalent chemistry, the covalent adaptable polymer networks (CAPNs) exhibit the comprehensive advantages of thermoplastics (e.g., recyclability, healability) and thermosets (e.g., solvent resistance, dimension stability). − With silica- or glass-like malleable behavior upon heating, the CAPNs are also termed as “vitrimers”. With elastic polymers as building blocks, the elastic vitrimers even show enhanced extensibility/stretchability, which can adapt the volume variation .…”

Closing the loop: polyimine thermosets from furfural derived bioresources

“…[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Previous research endeavors have primarily focused on employing vanillin and its derivatives for the synthesis of biobased polyimine thermosets, aiming to minimize environmental impact. [18][19][20][21][22][23][24] For instance, polyimine thermosets, synthesized from a vanillin-based dialdehyde monomer and conventional amine crosslinkers (i.e., diethylenetriamine and tris (2-aminoethyl)amine), displayed tensile strength values ranging from 47 to 57 MPa, accompanied by glass-transition temperatures (T g ) approximately at 60 °C. Remarkably, these thermosets exhibited notable self-healing properties and chemical recyclability in acidic conditions.…”