The Interaction Between The Preparation Of Organic / Inorganic Hybrid Materials, Organic And Inorganic Components

Organic/inorganic hybrid composites combine the advantages of both organic and inorganic components. In the thesis, several types of organic/inorganic hybrid materials were prepared for different purposes. The correlation between structure and properties for those materials was studied, and the interaction between organic and inorganic components was emphasized.1. Preparation of P(MMA-co-MA)/SiO₂-TiO₂ hybrid composites and its thermo- and photo-degradation behaviorsThe optically transparent poly(methyl methacrylate-co-maleic anhydride) (P(MMA-co-MA))/SiO2-TiO2 hybrids were prepared using 3-aminopropyl trimethoxysilane as a coupling agent for organic and inorganic components. Real-time Fourier-transformed infrared spectroscopy (FTIR) was used to monitor the curing process of hybrid sol, indicating the formed imide group decreased with increasing titania content. The scan electron microcropy (SEM), atomic force microcropy (AFM) and differential scanning calorimetry (DSC) results confirmed their homogeneous organic/inorganic network structures. TGA results showed that the incorporated titania greatly prohibited the thermo-degradation of hybrid films, especially at the content of 5.3 wt%, showing the increase of about 32.6 °C at the 5% loss temperature in air. The UV degradation behavior of P(MMA-co-MA) studied by quasi real-time FTIR showed that titania incorporated in the hybrid network provides a photo-catalytic effect rather than UV-shielding effect.2. Synthesis of UV-curable organic-Inorganic hybrid urethane acrylates and properties of the cured filmsAn organic-inorganic hybrid urethane acrylate hydrolytic condensate (HUA-HC) was prepared through sol-gel method with an acid catalyst of low concentration from a hybrid urethane acrylate prepolymer (HUA), which is a difunctional silane containing hydrolysable ethoxysilane groups (Si-OEt). The synthesis was monitored...