✍ Scribed by H. Kaddami; F. Vincens; G. Boiteux; J. F. Gérard; G. Seytre; J. P. Pascault
No coin nor oath required. For personal study only.
Organic-inorganic hybrid materials based on alkoxysilane-terminated macromonomers synthesised from a hydroxy-terminated hydrogenated polybutadiene, H-PBD, have been investigated. Different morphologies of the hybrid materials are obtained according to the conditions of the synthesis and to the non compatibility between the organic and the inorganic components.
In order to establish the relationships between the structure and the properties of the organic-inorganic (O/I) materials, infrared, small-angle X ray scattering, transmission electron microscopy, dynamical mechanical spectroscopy and dielectric measurements have been performed. This paper focuses especially on the analysis of the dielectrical relaxations in a large range of frequencies and temperatures compared with the dynamic mechanical one to propose a model of morphology of the final O/I materials. It is found in particular that a distinct interfacial region between the organic-rich phase and the silicate clusters is developed in the case of the low acid-toalkoxide ratio for hybrids (based on ␥-amino propyl triethoxysilane) (i.e. for the long periods of gelation).
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## Abstract Hybrid organic–inorganic coatings and free‐standing films were prepared and characterized. The hybrids were prepared from [3‐(glycidyloxy)propyl]trimethoxysilane, diethoxy[3‐(glycidyloxy)propyl]methylsilane, poly(oxypropylene)s of different molecular weights end‐capped with primary amin
Hybrid systems based on 3-trimethoxysilyl propyl methacrylate, tetramethylorthosilicate, and methyl methacrylate were developed for moisture protection and strengthening of glass objects. The hydrophobic behavior of the hybrid was obtained by adding different fluorinated precursors to the hybrid sol