Acrylic-silica Hybrid Nanocomposites Cured From Dendritic Acrylic Oligomer and Acrylic-functionalized Silica
1.Introduction Organic-inorganic hybrid materials have been extensively investigated recently because of its superior mechanical properties, thermal stability, and optical properties. Of particular interest is the acrylic-silica hybrid which has found great use in the optical membrane application. While acrylics provide easy processibility and optical transparency, silica particles provide hardness and scratch resistance1. However, the incompatibility between the acrylics and the silica causes poor dispersion of silica particles in the acrylics matrix and makes a direct blending of acrylics and silica particles impossible. Therefore, significant efforts have been devoted to form chemical bond between the acrylics and silica particles. Apart from the various sol-gel processes involving the in-situ formation of silica with tetraethylorthosilane, one method is to blend the unreacted acrylic monomer with the silica particles which have been modified with compatible organic species. Under UV irradiation, acrylic monomers and organic species copolymerize and crosslink to form a highly transparent hybrid composite material. Research data on modification of silica particles are abundant in literature2-10. Herein, we have prepared the acrylic-functionalized silica nanoparticles and copolymerized the modified silica nanoparticles with a dendritic acrylic oligomer (DA0) via UV-curing to make an acrylic-silica hybrid nanocomposite. The use of the dendritic oligomer enhances the cure rate and the choice of nano-size for silica particles provides transparency to the hybrid material.
hybrid nanocomposites UV-curable hard coat
Raymond Chien-Chao Tsiang Hau-Chun Chiang Chia-Hong Liu Chuan Hsiao Shu
Department of Chemical Engineering,National Chung Cheng University,Chiayi 621,Taiwan
国际会议
江苏镇江
英文
294-295
2008-10-15（万方平台首次上网日期，不代表论文的发表时间）