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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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| 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)
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Submitter: 忠永 清治
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