Preparation of laminated safety glass based on poly(vinyl butyral) blended with chromophore

Abstract For many years, laminated safety glass based on poly(vinyl butyral) (PVB) has been widely used in the fields of construction and transportation. In recent years, functional and intelligent laminated safety glass has attracted more and more attention. Laminated safety glass with adjustable refractive index has application value in optical communication and photoelectric switch lights. In this work, as a representative chromophore, disperse red 1 (DR 1 ) was blended with PVB solution, and then PVB/DR 1 film was prepared by spin coating. Based on this, laminated safety glasses have been constructed by hot processing after high‐voltage polarization. The refractive index of the laminated glass can be increased from 1.46 to 1.474 by controlling the polarization voltage. This will have important applications in military and defense industries, laser lenses and other fields. © 2025 Society of Chemical Industry.