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We computed by a modified tight binding approximation, the total electronic energy of three different hybrid polymers: H–SiO2, CH3–SiO2 and C6H5–SiO2. We made the hypothesis that the structures of these polymers are amorphous. Computational results regarding the total electronic energy and experimental data [1] on the toughness of these three hybrid polymers were compared. A good qualitative agreement...
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