Preparation of Photopolymerizable Organic-Inorganic Hybrid Materials by Nonhydrolytic Sol-Gel Processing for 3D Printing Applications
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Novel photopolymerizable organic-inorganic hybrid materials were synthesized by UV photopolymerization through free radical polymerization. The oligomeric resins of these materials were used to prepare various three dimensional structures through digital light processing (DLP) in three-dimensional (3D) printing technology. Novel organic-inorganic hybrid materials were prepared based on cross-linkable fluoromethyl derivatives, trimethoxysilane precursor and bulky silanes by non-hydrolytic sol-gel processing and followed by thermal condensation. The sol-gel reaction between two components obtained a high degree of dispersion of bulky silane compounds which determined the optical properties of the final composite objects. Dicacrylate derivatives were used as crosslinkers to facilitate curing and modify the chemical nature of gel framework which enhances mechanical properties of final hybrid materials.