The role of Zirconium as thermal stabilizer of PDMS-TEOS hybrids

resumo

Hybrid materials were prepared by sol-gel method using Tetraethylortosilicate and Polydimethylsiloxane silanol terminated with the addition of small contents of Zirconium Propoxide a parts per thousand currency sign5 wt%. The thermal stability of the prepared samples was studied by Infra-red spectroscopy, (29)Si Nuclear Magnetic Resonance, Thermal Analysis and Scanning Electron Microscopy. All samples were monolithic after drying at 120 A degrees C. After heat treatment at 400 A degrees C the samples prepared with 0 wt% in Zirconium Propoxide present high porosity. It was found that the content in Zirconium Propoxide is directly related with the thermal stability of the hybrid materials prepared in this study.

palavras-chave

SOL-GEL; ORMOSILS

categoria

Thermodynamics; Chemistry

autores

Marques, MMP; Salvado, IMM; Margaca, FMA; Ferreira, LM

nossos autores

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