Two-dimensional lamellar polyimide/cardanol-based benzoxazine copper polymer composite coatings with excellent anti-corrosion performance

Abstract

Room temperature cured two-dimensional lamellar polyimide/cardanol-based benzoxazine copper polymer composite coatings were successfully prepared, which exhibited excellent mechanical properties and anticorrosion properties.

Advancing coatings with polybenzoxazines: insights into molecular design, synthesis, and modification

“…Xiangyang Chen et al blended the cardanol-oa-based benzoxazine copper polymer (CBCP) with a two-dimensional sheet-shaped polyimide (1,4,5,8-naphthalene tetracarboxylic dianhydride polyimide (NDPI) and pyromellitic dianhydride polyimide (PDPI)) to develop composite coatings for metal coating corrosion protection, in which CuCl 2 catalysis was used to create a CBCP which has good mechanical characteristics and can cure at room temperature. 98 The incorporation of the two-dimensional sheet polyimide significantly improved the anticorrosion performance of the CBCP coating (high protection efficiency (99.99% and 97.98%)), owing to its ability to avoid and prevent the entry of corrosive media into the metal surface. Furthermore, the nitrogen atom of organic amine compounds formed a coordination bond with the hollow d orbitals of the metal, enabling the molecules adsorbed on the metal surface to form a protective film.…”

Kinetic Modeling of Ring-Opening Polymerization of Benzoxazines Using MIL-53-Al as a Potent Catalyst

“…PBzs have recently gained considerable interest because of their outstanding potential of exhibiting the excellent properties of traditional phenolic resins, which make them attractive alternatives to a wide range of end-use applications. Aerospace and naval composites, − automotive frames and components, , composite pipes for gas or oil, , circuit boards, , aerogels, , self-healing materials, − coatings and corrosion protection, − and paints , are among these end-use applications. PBzs possess highly attractive features such as high glass transition temperature ( T g ), , low water absorption, near zero shrinkage upon polymerization, , high char yield, , fast evolution of mechanical properties with the conversion, , similar and even lower costs than epoxy and bismaleimides resins, and excellent dielectric properties. , These outstanding properties and intrinsically rich molecular design flexibility allowing good compatibility with other structures have rendered PBz an important contender to epoxy and traditional phenolic resins in the composite industry.…”

Phosphorus‐containing benzoxazine modified epoxy resin: High flame retardancy, low dielectric, and low water absorption

“…With a six‐membered heterocyclic ring containing oxygen and nitrogen, benzoxazine undergoes ring‐opening polymerization and forms a cross‐linking structure with phenolic hydroxyl groups during heating or in the presence of catalysts 19,20 . Thus, it could be used together with other resins to improve the resistance of heat and fire 21–23 . Grishchuk et al 24 prepared EP and benzoxazine mixtures by mixing EP with different ratio of benzoxazine.…”