Synthesis, structure and photochromic properties of novel highly functionalized spiropyrans of 1,3-benzoxazin-4-one series

Construction of novel polybenzoxazine coating precursor exhibiting excellent anti-corrosion performance through monomer design

“…Small-molecular-weight benzoxazines (BZs) have existed for over 60 years [ 11 ]. Because of their high degree of molecular design flexibility, BZs resins have a variety of mechanical and physical characteristics [ 12 ]. Owing to these intriguing properties, benzoxazine is an attractive risk for using inebriety of industrial applications, including electronics, aerospace, composites, and coating [ [11] , [12] , [13] , [14] ].…”

“…Because of their high degree of molecular design flexibility, BZs resins have a variety of mechanical and physical characteristics [ 12 ]. Owing to these intriguing properties, benzoxazine is an attractive risk for using inebriety of industrial applications, including electronics, aerospace, composites, and coating [ [11] , [12] , [13] , [14] ]. The primary approach to prevent the mild steel from undergoing detrimental corrosion during industrial processes is through the use of organic coatings that offer resistance to corrosion.…”

“…In addition, the presence of many inter- and intramolecular hydrogen bonds makes PBZs an attractive alternative for applications due to their outstanding electric, physical, and chemical characteristics [ 5 , 23 , 24 ]. Almost no shrinkage, a significant char yield, a great improvement of mechanical qualities as a scale requires, glass transition at temperatures greater than curing temperatures, a water uptake act, and usually hydrophilic groups [ 12 , 25 ]. Affordable essential components, such as formaldehyde, primary amines, and phenolic compounds, may synthesize PBZs, which could then be polymerized through a ring-opening addition process without producing reaction byproducts [ 5 ].…”

“…Affordable essential components, such as formaldehyde, primary amines, and phenolic compounds, may synthesize PBZs, which could then be polymerized through a ring-opening addition process without producing reaction byproducts [ 5 ]. Due to acid-base interactions and the formation of encapsulants, the amphoteric property of PBZs, both basic and acidic, enables a wide range of applications as adhesives for both acidic and basic surfaces [ [11] , [12] , [13] , [14] ]. MS was coated with silane-functional polybenzoxazine to resist corrosion [ 26 ].…”