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Branching, aggregation, and phase separation during the gelation of tetraethoxysilane

机译:四乙氧基硅烷胶凝过程中的分支,聚集和相分离

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摘要

Time-resolved small-angle X-ray scattering is used to follow in situ the structuring of silica sols and gels in various chemical conditions. The acid-catalyzed and base-catalyzed polymerizations of TEOS, as well as the copolymerization of TEOS with organically modified trialkoxysilanes, are followed. The analysis points to the diversity of the mechanisms that govern the structuring of the reacting solutions, and most notably to the important role of physical forces. (C) 2007 Elsevier B.V.All rights reserved.
机译:时间分辨的小角度X射线散射用于在各种化学条件下原位追踪硅溶胶和凝胶的结构。随后进行了TEOS的酸催化和碱催化聚合,以及TEOS与有机改性的三烷氧基硅烷的共聚。分析指出了控制反应溶液结构的机制的多样性,尤其是物理力的重要作用。 (C)2007 Elsevier B.V.保留所有权利。

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