Brillouin spectroscopy on dried sonogels
作者:
M. Garci´a‐Herna´ndez,
R. J. Jime´nez‐Riobo´o,
C. Prieto,
J. J. Fuentes‐Gallego,
E. Blanco,
M. Rami´rez‐del‐Solar,
期刊:
Applied Physics Letters
(AIP Available online 1996)
卷期:
Volume 69,
issue 25
页码: 3827-3829
ISSN:0003-6951
年代: 1996
DOI:10.1063/1.117118
出版商: AIP
数据来源: AIP
摘要:
The elastic properties of organically modified silicates prepared by ultrasonics aided polycondensation of Tetraethoxysilane and Polidimethylsiloxane is studied by means of high resolution Brillouin spectroscopy. Our results evidence the microseparation of the organic and inorganic phases for the systems with high content of polymer. We propose a mechanical model that qualitatively explains the observed variation of the elastic constantc11vs molar fraction of dimethylsiloxane in these vitreous materials and develop a structural model that accounts for the observed dynamical behavior. ©1996 American Institute of Physics.
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