Preparation and properties of photocurable, high refractive, 2-naphthol epoxy-modified urethane acrylate

Abstract

The back light unit (BLU) is a core component of liquid crystal displays (LCDs) that are used in notebook computers, mobile phones, navigation devices, flat screen TVs, and public information display (PID) devices, among many others. To enhance the optical efficiency of LCDs, optical films with a high refractive index have been used in the BLU. In particular, high refractive chemicals have been the subject of recent investigations to enhance the optical efficiency of BLUs. In this study, we efficiently synthesized photocurable, high refractive 2-naphthol epoxy-modified urethane acrylate (2-NEUA) from 2-naphthol via a three-step reaction. The refractive index of 2-NEUA was higher than that of 2-naphthol epoxy acrylate (2-NEA), presumably because it contains more integrated aromatic rings and therefore has a higher electron density than 2-NEA. Furthermore, we critically evaluated the effects of 2-NEUA on the mechanical properties of UV curable films in this article.

High-refractive index acrylate polymers for applications in nanoimprint lithography

“…Acrylate polymers have been extensively used in a broad variety of fields owing to their facile synthesis, excellent optical transparency, convenient processability and great mechanical properties [41][42][43][44][45][46]. Most of the existing acrylate polymers exhibit low refractive index (~1.50), which considerably prevents their prospective application in advanced optical devices [47].…”

Nanomorphology of Polymer Blends for a Light-Scattering Thermosetting Plate Based on Self-Assembly

“…The light‐scattering thermoplastic plate must meet the following conditions: (a) light‐scattering rate of 380–480 nm, (b) uniform brightness, (c) high transparency, (d) mechanical properties, (e) outgassing amount during the process, (f) water and gas barrier properties, (g) cost performance, (h) productivity, and (i) thermal resistance and thermal stability. Conventional traditional light‐scattering plates constructed by doping or modifying nanoparticles such as SiO 2 , TiO 2 /SiO 2 , ZnO, Ag, dye,] or hyperbranched polymers into thermoplastic materials have been reported. Traditional light‐scattering plates using surface topography have also been investigated.…”