Preparation and properties of flexible free-standing films via polyalkoxysiloxanes by acid-catalyzed controlled hydrolytic polycondensation of tetraethoxysilane and tetramethoxysilane

被引：13

作者：

Gunji, Takahiro ^{[1
]}

Hayashi, Yuki ^{[1
]}

Komatsubara, Akemi ^{[1
]}

Arimitsu, Koji ^{[1
]}

Abe, Yoshimoto ^{[1
,2
]}

机构：

[1] Tokyo Univ Sci, Fac Sci & Technol, Dept Pure & Appl Chem, Noda, Chiba 2788510, Japan

[2] Tokyo Seiei Coll, Fac Hlth & Nutr, Dept Food Sci, Katsushika Ku, Tokyo 1248530, Japan

来源：

APPLIED ORGANOMETALLIC CHEMISTRY | 2012年 / 26卷 / 01期

关键词：

tetraethoxysilane; tetramethoxysilane; hydrolysis; free-standing film; coating film; HYBRIDS;

D O I：

10.1002/aoc.1861

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Acid-catalyzed controlled hydrolytic polycondensation of tetraethoxysilane (TEOS) and tetramethoxysilane (TMOS) provided polyalkoxysiloxanes PEOS and PMOS, with high molecular weight of 110012 000 or 270031 000, respectively. They were stable to self-condensation, soluble in organic solvents, and especially characterized by high silica content of up to 62% (PEOS) and 72% (PMOS). Flexible and transparent free-standing films with tensile strength of 1.65.2?MPa (PEOS) or 3.611.8MPa (PMOS) were prepared by heating polyalkoxysilanes at 80 degrees C for one to several days. They are also regarded to be a potential precursor for coatings and binders. Copyright (C) 2012 John Wiley & Sons, Ltd.

引用

页码：32 / 36

页数：5

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