Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Michihiko Asai"'
Autor:
Alexander L. Rusanov, Alexander V. Barzykin, Aleksey I. Kovalev, Kazuhiko Takeuchi, Mitsuru Ueda, Michihiko Asai
Publikováno v:
Macromolecular Chemistry and Physics. 206:2112-2121
The polycondensation of 1-ethynyl-2,5-dihexyl-4-iodobenzene in the presence of 1-ethynyl-2,5-dihexyl-4-(2-phenylethynyl)benzene proceeds according to the mechanism of initiated chain growth polycondensation. It has allowed the synthesis of oligomers
Autor:
Mitsuru Ueda, Michihiko Asai, Aleksey I. Kovalev, Kazuhiko Takeuchi, Ritsuko Nagahata, Alexander L. Rusanov, Alexander V. Barzykin, Sugiyama Junichi, Meenakshi Goyal
Publikováno v:
High Performance Polymers. 16:447-459
Autor:
Jun-ichi Sugiyama, Kazuhiko Takeuchi, Mitsuru Ueda, Okuyama Kenichi, Michihiko Asai, Ritsuko Nagahata
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 203:21-27
Various Pd–carbene complexes with bis(heterocyclic carbene) ligands were prepared and was investigated their catalytic activity for oxidative carbonylation of phenol with carbon monoxide to diphenyl carbonate (DPC). The catalyst system was composed
Autor:
Mitsuru Ueda, Okuyama Kenichi, Kazuhiko Takeuchi, Jun-ichi Sugiyama, Ritsuko Nagahata, Michihiko Asai
Publikováno v:
Green Chem.. 5:563-566
The direct synthesis of diphenyl carbonate (DPC) and polycarbonate (PC) by oxidative carbonylation was investigated. A palladium catalyst anchored to a resin via a heterocyclic carbene ligand exhibited high performance in DPC synthesis, and the total
Publikováno v:
Macromolecules. 35:6232-6238
Dendritic poly(amide-urea)s from the first to fourth generations with a very narrow molecular weight distribution were prepared from 1,1,1-tris(4-carboxymethyloxyphenyl)ethane as a core molecule, using aminodicarboxylic acid and aminodicarbonyl azide
Publikováno v:
Macromolecules. 35:6224-6231
The syntheses of two AB2 monomers, aminodicarboxylic acid (1) and aminodicarbonyl azide (2), and their model reactions for the one-pot synthesis of dendritic aromatic poly(urea-amide)s using the two AB2 monomers were carried out. The model reaction o
Publikováno v:
Macromolecules. 35:6202-6209
The ordered (-abcd-) poly(urethane−urea) was prepared by the polyaddition reaction of two nonsymmetric monomers, p-isocyanatobenzyl isocyanate (XabX) (1) with 4-aminophenylethyl alcohol (YcdY) (2) in the presence of dibutyltin dilaurate as a cataly
Autor:
Sugiyama Junichi, Amane Mochizuki, Takami Hikita, Kazuhiko Takeuchi, Michihiko Asai, Mitsuru Ueda
Publikováno v:
Polymer Journal. 33:547-553
Head-to-Tail Regularity of Polyurethanes from p -Isocyanatobenzyl Isocyanate and Ethylene Glycol by a Distannoxane Catalyst
Publikováno v:
Catalysis Communications. 2:145-150
Various Pd–pyridyl complexes tethered on polystyrene were investigated as novel immobilized Pd catalysts for the direct synthesis of diphenyl carbonate (DPC) by oxidative carbonylation using phenol, carbon monoxide, and air. These Pd catalysts show
Publikováno v:
High Performance Polymers. 13:S247-S255
An ordered polyurethane with a head-to-head or tail-to-tail (H–H or T–T) content of 90% was prepared by polyaddition reaction of a nonsymmetric monomer, tolylene 2,4-diisocyanate (1) with a symmetric monomer, ethylene glycol (2). The polymerizati