Multidynamic Poly(oxime–carbamate) Elastomers with Rosin Moieties

Abstract

General thermoset materials are prone to hidden cracks and aging during use and have strong cross-linked network structures, resulting in a waste of resources due to the difficulty of recycling after use. The introduction of reversible covalent/noncovalent bonds into materials can impart self-healing and recyclable properties, thereby extending the life cycle of the materials, which is in line with the goal of sustainable development. In this study, we prepared a series of multidynamic poly(oxime−carbamate) elastomers derived from rosin, based on a synergistic reinforcement strategy of hydrogen, metal−ligand coordination, and oxime−carbamate bonds using acrylic rosin and glycidyl methacrylate ester as monomers. Furthermore, the thermal, mechanical, dynamic, self-healing, and recyclability properties of the elastomers were investigated. The results showed that the prepared poly(oxime−carbamate) elastomers had good thermal stability (T d5% > 235 °C), solvent resistance and self-healing properties (120 min of healing at 70 °C with 89.5 ± 1.8% self-healing efficiency), excellent tensile strength (19.3 ± 0.5 MPa), toughness (44.3 ± 1.5 MJ m −3 ), and good recyclability. Furthermore, strain sensors constructed by using these elastomers have high stability. This study provides a research basis for the development of high-performance biobased self-healing materials for wearable electronics and flexible electronics applications.