ModeratelyHighRefractiveIndexLowOpticalDispersionPolymerswithPendantDiamondoids郑州大学化学系级李洋.pptVIP

Moderately High Refractive Index, Low Optical Dispersion Polymerswith Pendant DiamondoidsJ. APPL. POLYM. SCI. 2013, Wileyonline Reportor: LiYang Date:05/03/2013 20112310607 Introduction Optical plastics are widely used to produce lenses, viewfinders, windows, data storage media, light-diffusing elements etc. The field is dominated by commodity polymers such as poly (methyl methacrylate) (PMMA), polycarbonate (PC), and polystyrene (PS). However, no one material is ideal for all applications, leading to numerous efforts of produce optical polymers with customized properties. One important parameter for optical polymers is dispersion, the variance of refractive index with wavelength. Low dispersion in the visible region is desirable for optical plastics because of reduced chromatic aberration. Dispersion is often characterized by the Abbe number, which is approximately inversely proportional to optical dispersion. The other factor for optical polymers is refractive index. Comparison of COCs and the diamond structure led us to consider whether polymers containing small polycyclic units of diamond (‘‘diamondoids’’) might possess valuable optical properties. Experimental Result and Discussion Abbe numbers Conclusions Soluble, colorless polymers containing diamondoid moieties were successfully synthesized and characterized. Thin films of these polymers could be prepared easily by spin-coating; molding processes should be equally facile (except for pDm, where the Tg is above the polymer’s decomposition point). These materials exhibited significantly larger refractive indexes than PMMA, but similarly low dispersion, an unusual combination among optical plastics. Poly(1-vinyl adamantane) possessed the highest refractive index among the polymers studied, but its molar mass was very low (essentially oligomer