Synthesis and Characterization of UV-Curing Acrylate-silica hybrid optical film

• Main Authors: Jan Shiun-Chang, 詹勳昌
• Other Authors: Chen Wen-Chang
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/04491112135768315193

碩士 === 國立臺灣大學 === 化學工程學研究所 === 89 === In this study, acrylic polymer/silica hybrid films were prepared by UV-curing. In the preparation scheme, the colloidal silica was first reacted with a coupling agent, 3-(trimethoxy silyl)propyl methacrylate(MSMA); and then polymerized with a multifunctional acrylic monomer by UV-curing. The acrylic monomers used in this study were TMPTA and HDODA. Nano-scale(12nm) colloidal silica solution was used for achieving high optical transparency. The effects of the reaction formulations on the properties of the prepared films were investigated, including the ratio of MSMA/colloidal silica, the colloidal silica content, and the acrylic content. The reaction of each component in the hybrid films was investigated by FTIR. The studied properties of the prepared films include thermal properties, morphology, planarity, thickness, refractive index and its dispersion, absorption, and hardness. The experimental results suggest that Si-OH group on the colloidal silica is completely reacted with MSMA if the ratio of the MSMA to colloidal silica is greater than 1/3. The films show good thermal stability with the thermal decomposition temperature in the range of 298~339℃ and glass transition temperature is not detected below 200℃. Excellent surface planarity is obtained for the prepared hybrid materials. The film thickness is controlled mostly by the acrylic content. The refractive indices of the prepared hybrid thin films decreases with increasing the silica content. The abbe numbers of the prepared films are larger than 40, which suggest a very low optical dispersion of the hybrid materials. Excellent optical transparency is achieved in the visible region. The hardness of the prepared films can be as high as 9H. The results of thermal stability, optical properties, and hardness suggest that prepared hybrid films have potential applications as protective layers in optoelectronic devices.