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Shinagawa-ku, Japan

Tokyo Seiei College is a private four-year college in Katsushika, Tokyo, Japan founded in 2005 to replace Seitoku Junior College of Nutrition, which was founded in 1947 and chartered as a junior college in 1963. Its name, Sei-ei is how its predecessor was abbreviated in Japanese: Sei stands for Seitoku and Ei is for "nutrition". Wikipedia.


Shioda T.,Tokyo University of Science | Gunji T.,Tokyo University of Science | Abe N.,Tokyo University of Science | Abe Y.,Tokyo Seiei College
Applied Organometallic Chemistry | Year: 2011

Polyhedral oligomeric silsesquioxane (POSS) polymers were synthesized by the dehydrogenative condensation of (HSiO 3/2) 8 with water in the presence of diethylhydroxylamine followed by trimethylsilylation. Coating films were prepared by spin-coating of the coating solution prepared by the dehydrogenative condensation of POSS. The hardness of the coating films was evaluated using a pencil-hardness test and was found to increase up to 8H with increases in the curing temperature. Free-standing film and silica gel powder were prepared by aging the coating solution at room temperature. The silica gel powder was subjected to heat treatment under air atmosphere to show a specific surface area of 440 m 2 g -1 at 100 °C, which showed a maximum at 400 °C as 550 m 2 g -1. Copyright © 2011 John Wiley & Sons, Ltd. Source


Seki H.,Tokyo University of Science | Abe N.,Tokyo University of Science | Abe Y.,Tokyo Seiei College | Gunji T.,Tokyo University of Science
Chemistry Letters | Year: 2011

Novel pentacyclic ladder oligomethylsilsesquioxane was synthesized using cis,trans,cis-[MeSi(NCO)O] 4 as a building block. This compound was isolated in 13% yield by reprecipitation from the reaction mixture. X-ray crystallography revealed that pentacyclic rings assume a syn,anti,syn- configuration, resulting in the tube-like structure. © 2011 The Chemical Society of Japan. Source


Gunji T.,Tokyo University of Science | Shioda T.,Tokyo University of Science | Tsuchihira K.,Tokyo University of Science | Seki H.,Tokyo University of Science | And 3 more authors.
Applied Organometallic Chemistry | Year: 2010

All siloxane-type siloxane-polyhedral oligomeric silsesquioxane [(HSiO 3/2)8, T8 H] copolymers were synthesized by the dehydrogenative condensation of T8 H with diphenylsilanediol, tetraphenyldisiloxane-1,3-diol or silanol-terminated polydimethylsiloxanes in the presence of diethylhydroxylamine followed by trimethylsilylation. Coating films were prepared by spin-coating of the coating solutions prepared from the dehydrogenative condensation products. The hardness of the coating films was evaluated by a pencil hardness test and was found to increase up to 6H with increases in the curing temperature. Silica gels were prepared by concentrating the coating solution following by pyrolysis. These silica gels showed a specific surface area 449m2/g at 650 °C corresponding to the formation of a silica network in response to combustion of the phenyl groups. Copyright © 2010 John Wiley & Sons, Ltd. Source


Seki H.,Tokyo University of Science | Kajiwara T.,Tokyo University of Science | Abe Y.,Tokyo University of Science | Abe Y.,Tokyo Seiei College | Gunji T.,Tokyo University of Science
Journal of Organometallic Chemistry | Year: 2010

Highly regulated ladder-structured polymethylsilsesquioxanes soluble in solvents with high molecular weight were synthesized from sila-functionalized tetramethylcyclotetrasiloxanes [MeSiXO]4 (X = H, OEt, NCO) by the dehydrogenative condensation of [MeSiHO]4 with water in the presence of N,N-diethylhydroxylamine or the hydrolytic polycondensation of [MeSiXO]4 (X = OEt, NCO). Formation of a siloxane-ladder structure was confirmed based on the appearance of two absorption bands and a signal due to Si-O-Si linkage in the infrared spectra and a silsesquioxane unit in 29Si nuclear magnetic resonance spectra, respectively. The narrow half-peak width of the 29Si nuclear magnetic resonance spectra suggested the formation of a highly regulated ladder structure for polymethylsilsesquioxanes. © 2010 Elsevier B.V. All rights reserved. Source


Gunji T.,Tokyo University of Science | Hayashi Y.,Tokyo University of Science | Komatsubara A.,Tokyo University of Science | Arimitsu K.,Tokyo University of Science | And 2 more authors.
Applied Organometallic Chemistry | Year: 2012

Acid-catalyzed controlled hydrolytic polycondensation of tetraethoxysilane (TEOS) and tetramethoxysilane (TMOS) provided polyalkoxysiloxanes PEOS and PMOS, with high molecular weight of 1100-12 000 or 2700-31 000, 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 1.6-5.2 MPa (PEOS) or 3.6-11.8 MPa (PMOS) were prepared by heating polyalkoxysilanes at 80°C for one to several days. They are also regarded to be a potential precursor for coatings and binders. Copyright © 2012 John Wiley & Sons, Ltd. Source

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