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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Percolation transition of siloxane domain in partially phenylated organic/inorganic hybrid glass
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Percolation transition of siloxane domain in partially phenylated organic/inorganic hybrid glass

机译：部分苯基化有机/无机杂化玻璃中硅氧烷结构域的渗透转变

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摘要

Organic-in organic hybrid glass undergoes a percolation transition of the organic or inorganic moiety at a certain volume fraction of either phase. At the percolation threshold, various properties of the hybrid glass exhibit an abrupt change. We attempted to evaluate the threshold volume fraction of the percolation transition in partially phenylated glass from the measurable or observable behavior at the percolation transition. The volume fraction of the phenyl moiety in the hybrid glass was varied by variation of the mixed fraction of two starting silicon alkoxides, TEOS (tetraethylorthosilicate) and PTES (phenyltriethoxysilane). The threshold volume fraction was estimated as the point at which the dye-colored state with hydrophilic/hydrophobic dye, the Vickers hardness and siloxane bonding length exhibited a significant change. The percolation threshold of the phenyl moiety was estimated to be approximately 50 vol.%. At this threshold. the Vickers hardness showed a abrupt and almost discrete decrease and noticeable elasticity appeared. At the same time, the siloxane bondings were stretched by approximately 20% on the percolation of the phenyl part. In partially phenylated glass prepared from mixture of TEOS and PTES, the siloxane bondings seem to have a strong tendency to form a percolated siloxane network, and as a result of that, only the percolation of the phenyl moiety could be captured from the experimentally measurable quantities. (C) 2007 Elsevier B.V. All rights reserved.
机译：有机混入有机杂化玻璃在任一相的一定体积分数处经历有机或无机部分的渗滤转变。在渗滤阈值下，混合玻璃的各种性能呈现出突变。我们试图从渗滤转变时的可测量或可观察到的行为评估部分苯化玻璃中渗滤转变的阈值体积分数。通过改变两种起始硅醇盐，TEOS（原硅酸四乙酯）和PTES（苯基三乙氧基硅烷）的混合比例，可以改变杂化玻璃中苯基部分的体积分数。阈值体积分数被估计为亲水/疏水染料的染料着色状态，维氏硬度和硅氧烷键合长度表现出显着变化的点。苯基部分的渗透阈值估计为约50体积％。在此阈值。维氏硬度显示出突然的和几乎不连续的降低，并且出现了显着的弹性。同时，硅氧烷结合在苯基部分的渗透上被拉伸约20％。在由TEOS和PTES的混合物制备的部分苯基化玻璃中，硅氧烷键似乎具有形成渗透的硅氧烷网络的强烈趋势，因此，只能从实验可测量的量中捕获苯基部分的渗透。 。 （C）2007 Elsevier B.V.保留所有权利。

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