Innocenzi, Plinio and Brusatin, Giovanna and Licoccia, Silvia and Di Vona, Maria Luisa and Babonneau, Florence and Alonso, Bruno (2003) Controlling the thermal polymerization process of hybrid organic-inorganic films synthesized from 3-methacryloxypropyltrimethoxysilane and 3-aminopropyltriethoxysilane. Chemistry of materials, Vol. 15 , p. 4790-4797. eISSN 1520-5002. Article.
Full text not available from this repository.
An important step in the synthesis of hybrid materials is the control of organic chains formation when the organically modified alkoxides are bearing polymerizable groups, such as acrylate or epoxy. Control of the process can be achieved through a deep understanding of the correlation between the synthesis parameters and the final structure. In this paper we have used 3-methacryloxypropyltrimethoxysilane (MPTMS) co-hydrolyzed with tetraethyl orthosilicate (TEOS) using 3-aminopropyltriethoxysilane (APTS) as basic catalyst and network modifier of the structure. The acrylate function in MPTMS has been thermally polymerized and the process has been tuned, with the purpose to reach the highest polymerization efficiency, by controlling the synthesis parameters. The synthesis has been followed in solution by 13C and 29Si nuclear magnetic resonance (NMR) spectroscopy, and the structural changes in the films have been studied by Fourier transform infrared spectroscopy (FTIR) as a function of the thermal treatment. Multinuclear solid state NMR spectroscopy on related bulk materials has provided supplementary information on the hybrid network formation. As-deposited films are not fully condensed but a very large conversion of the C═C double bonds (up to 98% of polymerization degree) is achieved during thermal curing by the simultaneous inorganic polycondensation and organic polymerization
I documenti depositati in UnissResearch sono protetti dalle leggi che regolano il diritto d'autore
Repository Staff Only: item control page