One-pot synthesis and versatile applications of recyclable aminal-linked dynamic framework

Abstract

The diverse, multifunctional properties of polymers and composites have made them popular for developing improved materials and new products. Versatile recyclable polyhemiaminal dynamic networks (PHDNs) were prepared from paraformaldehyde and p-phenylenediamine via in situ polymerization at low temperatures. The as-prepared thermosetting polymer exhibited excellent solvent resistance, thermal resistance, and Young's modulus. The composites reinforced with functionalized carbon nanotubes showed better properties than the original polymer. The thermosetting polymer and its composites are potential precursors for the design of high-performance electrochemical active materials for supercapacitors with excellent electrochemical reversibility and charge–discharge properties. These superior properties demonstrated that the polymers and composites are multipurpose materials suitable for automotive, aerospace, and energy devices and in other related fields. The PHDN could be repeatedly depolymerized and the original monomers recovered completely at low pH and room temperature in a short time, which makes them promising candidates for various applications.