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|Type:||Artigo de periódico|
|Title:||Synthesis of a thermally stable silica/p-anisidine sol-gel powdered material|
|Abstract:||A thermally stable silica/p-anisidine material was obtained by a sol-gel method in two steps: (a) p-anisidine was reacted with 3-chloropropyltrimethoxysilane using NaH as a base activator and; (b) the resulting product of this reaction, p-anisidinepropyltrimethoxysilane (AnPTMS), was condensed with tetraethylorthosilicate. The sol-gel materials were obtained by using the AnPTMS precursor at concentrations of 0.05, 0.15, 0.23, 0.35, and 0.46 mol L-1. The thermal stability of the organic attached groups increases with the AnPTMS precursor concentration added. For the 0.35 and 0.46 mol L-1 cases, the resulting materials were thermally stable up to 300 degreesC, under vacuum. (C) 2001 Academic Press.|
infrared thermal analysis
|Editor:||Academic Press Inc|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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