Hydroxylated Cyclophosphazene/Silica Hybrid Materials: Synthesis and Characterization

Journal of Inorganic and Organometallic Polymers - 2002
Sandra Dirè1, Giacomo Facchin2, Riccardo Ceccato1, Luigi Guarino3,2, Alessandro Sassi2, Mario Gleria3
1Dipartimento di Ingegneria dei Materiali, Università di Trento, Trento, Italy
2Istituto di Scienze e Tecnologie Molecolari del Consiglio Nazionale delle Ricerche, c/o Dipartimento di Processi Chimici dell'Ingegneria, Università di Padova, Padova, Italy
3Istituto di Scienze e Tecnologie Molecolari del Consiglio Nazionale delle Ricerche, c/o Dipartimento CIMA dell'Università, Padova, Italy

Tóm tắt

The synthesis of new hybrid materials that are prepared by the sol-gel technique is presented. The synthesis involves the reaction of a free hydroxylic group-containing cyclophosphazene, hexakis(4-hydroxyphenoxy)cyclophosphazene, and a hydrolyzed tetraethoxysilane under acid catalysis. Evidence for the formation of genuine chemical bonds between the hydroxylated cyclophosphazene and the three-dimensional silica network is presented. The formation of these bonds was confirmed by spectroscopic techniques (FTIR, 31P, 29Si, and 13C NMR both in solution and in the solid state and X-Ray Diffraction analysis). The results are supported by thermal characterization of the materials based on Differential Thermal Analysis (DTA) and Thermogravimetric Analysis (TGA) determinations.

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Journal of Inorganic and Organometallic Polymers

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