Synthesis of Chemically Recyclable Oxime Ester-based Epoxy Resin
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Epoxy resin is widely used for its excellent mechanical properties, chemical resistance, and thermal stability. However, its non-degradability is an environmental concern. To tackle this, a new epoxy resin called benzoquinone oxime epoxy (BOE) has been developed, featuring an oxime structure that allows for chemical decomposition. Optimal curing conditions for BOE have been determined at 85 °C using Differential Scanning Calorimetry (DSC). BOE shows promising mechanical properties, with a tensile strength of 20 MPa, modulus of 400 MPa, and a glass transition temperature (Tg) of 76 °C. The key advantage of BOE is its ability to undergo chemical decomposition, demonstrated by a rate constant of 3.1×10‒2 h‒1. These findings open up opportunities for developing recyclable epoxy molecules with oxime structures, leading to environmentally friendly epoxy resins with reduced ecological impact.