高折光指数聚合物研究进展

Recent Developments in High Refractive Index Polymers

高折光指数聚合物材料因为质量轻、柔韧性好、抗冲强度高、易于加工等优异的性能在光学和光电子领域实现了广泛的应用。聚合物的折光指数主要由其化学结构决定,芳环、含硫基团、除氟元素以外的卤素、金属元素和富勒烯等具有较大的可极化程度,能够有效提高聚合物的折光指数,通过合理的分子设计可以实现对聚合物折光指数的调控。因此,了解和熟悉化学结构与折光指数的关系对于合成高折光指数聚合物具有重要的指导意义。本文主要介绍设计合成高折光指数的聚合物的基础理论,以及近些年来高折光指数聚合物的研究进展。

High refractive index polymers （HRIPs） have been widely utilized in optical and optoelectronic devices due to their advantages of light weight, flexibility, high impact strength and easy processing. The refractive indices of polymers mainly depend on their chemical structures. Introducing highly polarizable atoms or groups such as aromatic rings, sulfur- containing groups, halogens （except fluorine）, organometallic moieties, and fullerenes into the polymers can efficiently enhance their refractive indices. Therefore, the refractive index value of a polymer can be tuned in the way of molecular tailoring, which provides good insight in developing new high refractive index polymers. This mini-review summarizes principles in molecular designing and recent progresses in high refractive index polymers.