Paper Title:
Solvent-Free Synthesis of Functional Siloxanes Bearing 4-Trifluoromethylphenyl Group
  Abstract

Recently we have been investigating solvent-free synthesis of siloxanes. Using no solvent gives less load to environment, and decreases cost in chemical industry. On the other hand, acidic or basic condition may not be applied to siloxanes bearing functional substituents. Therefore, the development of synthetic methods in neutral condition is desired. In this paper, we report the solvent-free thermal condensation of siloxane from silanol bearing vinyl group and strong electron-withdrawing 4-trifluoromethylphenyl group. Furthermore, we examined thermal properties of obtained vinyl-substituted silanol by TG-DTA measurement. With these results, we could determine the temperature of thermal condensation. We also elucidated the reaction pathway by tracing the reaction with GC-MS. Finally, we propose the possible reaction pathway from silanediol to cyclotrisiloxane (D3) and cyclotetrasilxane (D4).

  Info
Periodical
Chapter
Chapter 2: Chemical Science and Technology
Edited by
Osamu Hanaizumi, Masafumi Unno and Kenta Miura
Pages
51-54
DOI
10.4028/www.scientific.net/KEM.497.51
Citation
Y. Egawa, M. Unno, "Solvent-Free Synthesis of Functional Siloxanes Bearing 4-Trifluoromethylphenyl Group", Key Engineering Materials, Vol. 497, pp. 51-54, 2012
Online since
December 2011
Export
Price
$35.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Angeles Mantilla, Francisco Tzompantzi, María Manríquez, Guadalupe Mendoza, Jose L. Fernández, Ricardo Gómez
Abstract:ZnAlFe mixed oxides with high surface area were obtained by the calcination (723 K) of ZnAlFe layered double hydroxides (LDHs). The calcined...
55
Authors: Leticia M. Torres-Martínez, M. Elena Meza-de la Rosa, Lorena L. Garza-Tovar, Isaías Juárez-Ramírez, Francisco Tzompantzi, Gloria Del Angel, Juan M. Padilla, Ricardo Gómez
Abstract:Perovskite-type compounds such as alkali tantalates, ATaO3 (A = Li, Na and K), prepared by the sol-gel method are reported as heterogeneous...
61
Authors: Yun Li
Abstract:Industrial naphthalene is the main material for the polynaphthalene sulphonate production, domestic industrial naphthalene supply is unable...
1361
Authors: Ai Huan Gao, Pi Hui Pi, Jiang Cheng, Zhuo Ru Yang
Chapter 3: Composites
Abstract:Aluminum sheet was encapsulated by inorganic-organic hybrid film through a base catalyzed sol-gel method using organic acrylate silane resin...
390