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Materiale Plastice (Mater. Plast.), Year 2010, Volume 47, Issue 3,





Denisa MANZU, Florina DUMITRU, Anton FICAI, Anca RAZVAN, Cornelia GURAN Organocyclophosphazenes / Silica Hybrid Materials I. Synthesis and characterization of siloxane monomers and of cyclophosphazene / SiO2 composites


Abstract:
In the context of developing new phosphazene/silica hybrids for preparation of thermally resistant membranes for gas separation processes, two cyclophosphazenes/organosiloxane monomers (1 and 2, scheme 1) were synthesized via aminolysis of hexachlorocyclotriphosphazene (N3P3Cl6) with the monoamine functional trialkoxysilanes: 3-(triethoxysilyl)-propylamine (H2N-(CH2)3-Si(OC2H5)3) or 3-(trimethoxysilyl)-propylamine (H2N-(CH3)3-Si(OCH3)3), respectively, as new starting compounds for cyclophosphazene/SiO2 composites prepared by the sol-gel process. The siloxane monomers, N3P3Cl33 (1) and N3P3Cl42 (2), as well as the corresponding composites {N3P3Cl33}y-(SiO2)41y (1’) and {N3P3Cl43}y-(SiO2)80y (2’) issues from the sol-gel process, have been characterized by infrared spectroscopy and elemental analysis, TG-DTA-DSC coupled thermal analyses, as well as by XPS, XRD, and SEM-EDAX investigations. Keywords: cyclophosphazene, sol-gel process, organic-inorganic hybrid materials



Issue: 2010 Volume 47, Issue 3
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