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Substituent effects on the glass transition phenomena of polyorganosilsesquioxane particles prepared by two-step acid–base catalyzed sol–gel process

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/73935

Title: Substituent effects on the glass transition phenomena of polyorganosilsesquioxane particles prepared by two-step acid–base catalyzed sol–gel process
Authors: TAKAHASHI, Kenji Browse this author
TADANAGA, Kiyoharu Browse this author →KAKEN DB
HAYASHI, Akitoshi Browse this author
TATSUMISAGO, Masahiro Browse this author
Keywords: Polyorganosilsesquioxane particles
Two-step acid-base catalyzed sol-gel process
Glass transition
Electrophoretic deposition
Thermal softening
Issue Date: 1-Mar-2011
Publisher: Ceramic Society of Japan
Journal Title: Journal of the Ceramic Society of Japan
Journal Title(alt): 日本セラミックス協会学術論文誌
Volume: 119
Issue: 1387
Start Page: 173
End Page: 179
Publisher DOI: 10.2109/jcersj2.119.173
Abstract: Polyorganosilsesquioxanes (RSiO3/2) (R: organic group) particles with different organic groups such as alkyl and aryl groups were prepared using a two-step acid–base catalyzed sol–gel process. Spherical particles were formed at room temperature using the two-step acid–base catalyzed sol–gel process in which trifunctional organoalkoxysilanes with R = methyl, n-propyl, n-butyl, phenyl, and benzyl were used as starting materials. Polyorganosilsesquioxanes with longer alkyl groups or phenethyl group prepared by the two-step acid–base catalyzed sol–gel process were oily material at room temperature. Polyorganosilsesquioxanes with shorter alkyl or aryl groups exhibited the glass transition. In contrast, polyorganosilsesquioxanes with longer alkyl groups showed no glass transition behavior. The occurrence of glass transition phenomena of polyorganosilsesquioxanes was concluded to be strongly dependent on the chain length of organic substituents.
Rights: https://creativecommons.org/licenses/by-nd/4.0/deed.ja
Type: article
URI: http://hdl.handle.net/2115/73935
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 忠永 清治

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