Actas de congresos
Investigation On Kinetics Of Thermal Decomposition In Polysiloxane Networks Used As Precursors Of Silicon Oxycarbide Glasses
Registro en:
Journal Of Non-crystalline Solids. , v. 304, n. 1-3, p. 92 - 100, 2002.
223093
10.1016/S0022-3093(02)01009-8
2-s2.0-0036605224
Autor
Schiavon M.A.
Redondo S.U.A.
Pina S.R.O.
Yoshida I.V.P.
Institución
Resumen
In this study, polysiloxane networks prepared by hydrosilylation or hydrolysis/condensation reactions were considered to be potential precursors for Si-C-O systems. Different precursors had different pyrolytic properties, which was essentially due to their molecular architecture. The kinetics parameters, such as the activation energy, E (kJ/mol) involved in the polymer-to-ceramic conversion, were investigated by thermogravimetry using a multiple heating rate kinetic method. The relationships between the molecular architecture and the precursor composition were compared to that of a linear poly(dimethylsiloxane) precursor. Solid-state 29Si nuclear magnetic resonance, infrared spectroscopies, density measurements, and X-ray diffraction measurements were made on the final samples. These products were typically amorphous, with a molecular structure formed by a random distribution of different silicon sites and variable amounts of free carbon residue. © 2002 Elsevier Science B.V. All rights reserved. 304 1-3 92 100 Riedel, R., (1996) Materials Science and Technology. A Comprehensive Treatment, 17, p. 1. , R.W. Cahn, P. Haasen, E.J. Kramer (Eds.), VCH, Weinheim Bill, J., Aldinger, F., (1999) Precursor-Derived Ceramics: Synthesis, Structures, and High Temperature Mechanical Properties, p. 33. , J. Bill, F. Wakai, F. Aldinger (Eds.), Wiley-VCH, Weinheim Greil, P., (1995) J. Am. Ceram. Soc., 78, p. 835 Renlund, G.M., Prochaska, S., Doremus, R.H., (1991) J. Mater. Res., 6, p. 2723 Rouxel, T., Massouras, G., Sorarù, G.D., (1999) J. Sol-Gel Sci. Tech., 14, p. 87 Kalfat, R., Babonneau, F., Gharbi, N., Zarouk, H., (1996) J. Mater. Chem., 6, p. 1673 Liu, Q., Shi, W., Babonneau, F., Interrante, L.V., (1997) Chem. Mater., 9, p. 2434 Radovanovic, E., Gozzi, M.F., Gonçalves, M.C., Yoshida, I.V.P., (1999) J. Non-Cryst. Solids, 248, p. 37 Pantano, C.G., Singh, A.K., Zhang, H., (1999) J. Sol-Gel Sci. Tech., 14, p. 7 Gozzi, M.F., Gonçalves, M.C., Yoshida, I.V.P., (1999) J. Mater. Sci., 34, p. 155 Gozzi, M.F., Yoshida, I.V.P., (1997) Eur. Polym. J., 33, p. 1301 Schiavon, M.A., Pardini, L.C., Yoshida, I.V.P., (2001) Key Eng. Mater., 189, p. 48 Redondo, S.U.A., Radovanovic, E., Torriani, I.L., Yoshida, I.V.P., (2001) Polymer, 42, p. 1319 Ozawa, T., (1965) Bull. Chem. Soc. Jpn., 38, p. 1881 Thomas, T.H., Kendrick, T.C., (1969) J. Polym. Sci.: Part A-2, 7, p. 537 Campostrini, R., D'Andrea, G., Carturan, G., Ceccato, R., Sorarù, G.D., (1996) J. Mater. Chem., 6, p. 585 Çolak, N., Akgün, A., (1999) Polym. Plast. Technol. Eng., 38, p. 647 Tutas, M., Saglam, M., Yüksel, M., Güler, Ç., (1987) Termochim. Acta, 111, p. 121 Li, D., Hwang, S.-T., (1992) J. Appl. Polym. Sci., 44, p. 1979 Michalczyk, M.J., Farneth, W.E., Vega, A.J., (1993) Chem. Mater., 5, p. 1687 (1973) Powder Diffraction File Search Manual, , Joint Committee on Powder Diffraction Standarts, Swarthmore Hurwits, F.I., Meador, M.A.B., (1999) J. Sol-Gel Sci. Tech., 14, p. 75 Camino, G., Lomakin, S.M., Lazzari, M., (2001) Polymer, 42, p. 2395 Ikeda, M., Nakamura, T., Nagase, Y., Ikeda, K., Sekine, Y., (1981) J. Polym. Sci.: Polym. Chem. Ed., 19, p. 2595