abstract
Hybrid thin films with nano-sized inorganic domain were synthesized from poly (acrylic) and monodispersed colloidalsilica with adhesion promoter. The 3 - (trimethoxysilyl) propyl methacrylate (MSMA) was treated with colloidalsilica first, is bound and then polymerized with acrylic monomer to form a precursor. Then, the precursor was spin-coated and cured to form the hybrid films. The silica content in the hybrid thin films was varied from 0 to 50 wt%. The experimental results showed that the coverage area of the silica particles from the MSMA decreased with increasing silica content and resulted in the aggregation of silica particles in the hybrid films. In this way the silica in the hybrid films from 20 to 35 nm was varied by varying molar ratios MSMA to silica. The results of scanning electron microscopy, transmission electron microscope, and elemental analysis support the above results. The prepared hybrid films from the crosslinked acrylic polymer moiety showed much better film uniformity, thermal stability and mechanical properties than the poly (methyl methacrylate) (PMMA) hybrid materials. Large needle holes were in the PMMA-silica hybrid films found probably due to the significant difference in the thermal properties between the two groups or the evaporation of solvent. The refractive index increases linearly with increasing proportion of silica in the hybrid films. Excellent optical clarity was obtained in the prepared hybrid films. These results show that the hybrid thin films have potential applications as passive films for optical devices.
Hybrid thin films with nano-sized inorganic domain were synthesized from poly (acrylic) and monodispersed colloidalsilica with adhesion promoter. The 3 - (trimethoxysilyl) propyl methacrylate (MSMA) was treated with colloidalsilica first, is bound and then polymerized with acrylic monomer to form a precursor. Then, the precursor was spin-coated and cured to form the hybrid films. The silica content in the hybrid thin films was varied from 0 to 50 wt%. The experimental results showed that the coverage area of the silica particles from the MSMA decreased with increasing silica content and resulted in the aggregation of silica particles in the hybrid films. In this way the silica in the hybrid films from 20 to 35 nm was varied by varying molar ratios MSMA to silica. The results of scanning electron microscopy, transmission electron microscope, and elemental analysis support the above results. The prepared hybrid films from the crosslinked acrylic polymer moiety showed much better film uniformity, thermal stability and mechanical properties than the poly (methyl methacrylate) (PMMA) hybrid materials. Large needle holes were in the PMMA-silica hybrid films found probably due to the significant difference in the thermal properties between the two groups or the evaporation of solvent. The refractive index increases linearly with increasing proportion of silica in the hybrid films. Excellent optical clarity was obtained in the prepared hybrid films. These results show that the hybrid thin films have potential applications as passive films for optical devices.
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