A glass-like preparation method of a functional thermosetting high molecular material

Abstract

This invention discloses a method for preparing functional thermosetting polymer materials with a vitrification-like state, belonging to the field of polymer material regeneration and functional modification technology. The preparation method uses thermosetting polymer powder containing ester or carbamate bonds as a matrix, combined with a phosphorus-containing flame-retardant dynamic crosslinking agent, and optionally adds functionalized nanofillers. Through the in-situ induction of dynamic covalent bond exchange reactions of phosphate esters at the powder particle interface by the phosphorus-containing flame-retardant dynamic crosslinking agent, chemical welding and crosslinking network reconstruction between powder particles are achieved. The functionalized nanofillers can participate in the dynamic network reconstruction and construct a three-dimensional isolation network. This method enables the thermosetting material to recover mechanical strength by up to 80%, endowing the material with intrinsic flame retardancy, thermally triggered self-healing, and recyclable properties. After adding functionalized nanofillers, the material further possesses antistatic, high thermal conductivity, photothermal triggered self-healing, and electromagnetic shielding properties, achieving high-value regeneration of waste thermosetting polymer materials with integrated structure and function.

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