Self-healing polymers with PEG oligomer side chains based on multiple H-bonding and adhesion properties

Abstract

In an attempt to prepare polymers able to function as self-healing materials, quadruple hydrogen-bonding ureidopyrimidinone (UPy) moiety was introduced to polymer systems. Low crosslinking materials based on hydroxyethyl acrylate (HEA) and poly(ethylene glycol) methacrylate (PEGMA) containing 10% of UPy moieties were synthesized, and their thermal and rheological properties were investigated by dynamic mechanical analysis (DMA) and rotational rheometer. The hydroxyethyl group and PEG oligomer with high molecular polarity as side chains provided high surface energies and adhesion property. The fastest self-healing of these polymer films can be finished within 20 min. The adhesion strength tests via tensile mode revealed the potential of these self-healing polymers in application as adhesives.

Bouncing and 3D printable hybrids with self-healing properties

“…While hydrogen bonding is thought to be essential for the self-healing, the highly elastomeric nature of the PTHF is important for chain rearrangements to accommodate the healing. 48,49 The specific combination of all the non-covalent bonding interactions could contribute to the organisation of the organic and inorganic moieties in an ordered way that is believed to be responsible for the autonomous and intrinsic self-healing process. Cutting the hybrid will break covalent bonds and other intermolecular interactions.…”

A robust self-healing polyurethane elastomer: From H-bonds and stacking interactions to well-defined microphase morphology

“…It has been introduced into different matrices with different topologies by employing various strategies. For example, reversible addition-fragmentation chain transfer polymerization (RAFT) was employed to prepare UPy-contained multi-block supramolecular materials [24][25][26][27][28][29]. In addition, UPy moieties could be grafted onto the polymeric backbone to obtain dynamic hydrogen-bonding cross-linked materials [30][31][32][33].…”

Melt‐processable and self‐healing poly(vinyl alcohol) elastomer containing diol groups in the side chain

“…developed an autonomic self‐healing thermoplastic elastomer based on hydrogen bonds by combining enhanced stiffness and toughness with the dynamic supramolecular assemblies. Hence, the hydrogen bond has been proven as a promising candidate for the fabrication of bulk polymers with a repeatable healing process that requires no healing agents or external stimuli . PVA with a large amount of intramolecular and intermolecular hydrogen bonds could have self‐healing capability if the PVA chain mobility was great enough to allow the PVA chains to rearrange and their hydroxyl groups to reform either interchains or intrachains hydrogen bonds.…”