Cyanopyridone doped PMMA films as UV and blue light filters: Preparation and characterization

Abstract

Cyanopyridone-based conjugated small molecule (CP) doped poly(methyl 2-methylpropenoate) polymeric films were obtained using solvent-casting approach with various concentrations of CP loading ranging from 1 to 6 wt%. Further, structure and linear absorption properties of the prepared polymeric films were investigated in detail. Structural characterizations of polymeric films were carried out using XRD technique, where an amorphous hump was noticed which indicates the non-crystalline nature of examined polymeric composites. Spectral assessment of the films like absorbance and transmittance were made by using spectrophotometer in the wavelength (λ) region ranging from 200 to 1100 nm and followed by the determinations of absorption index (k), as well as optical energy band gap (Eg). Results revealed that the optical constants vary with the amount of CP loading and also, these polymeric composite films effectively blocks nearly 94 % of UV and blue light transmission and hence these films can be used in the UV and blue region filters.