Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Katsuyuki Tsuda"'
Autor:
Katsuyuki Tsuda, Toyoji Kakuchi, Ryohei Kakuchi, Ryosuke Sakai, Eric B. Barasa, Satoshi Umeda, Magdalena Ziabka, Shota Okade, Toshifumi Satoh
Publikováno v:
Macromolecules. 43:7406-7411
Poly(phenylacetylene) with rationally designed urea groups was demonstrated to be a superior anion receptor possessing both a colorimetric response ability and a positive homotropic allosteric binding mode. The target polymer, poly(phenylacetylene) w
Autor:
Masahiro Miyajima, Toyoji Kakuchi, Kazuaki Yokota, Naoya Sugimoto, Katsuyuki Tsuda, Masahiro Ohara
Publikováno v:
Polymer Journal. 31:442-446
The cationic polymerization of 1,7-diene monomers 1a and 1b produced polymers 2a and 2b with seven-membered rings as a precursor of azacrown polymer. SnCl4 and BF3·OEt2 in dichloromethane were effective for polymerization. Sulfuric acid was less eff
Publikováno v:
Macromolecular Chemistry and Physics. 199:1827-1834
SUMMARY: Anionic polymerization of 2-propynyl methacrylate (1), 3-trimethylsilyl-2-propynyl methacrylate (2), 2-butynyl methacrylate (3), and 3-pentynyl methacrylate (4) was carried out in tetrahydrofuran at ‐788C for 1 h. The employed initiator sy
Autor:
Takashi Ishizone, Manabu Yaegashi, Akira Hirao, Toyoji Kakuchi, Masahiro Miyajima, Fumiaki Ishii, Katsuyuki Tsuda, Ken'ichi Tsutsumi
Publikováno v:
Polymer Bulletin. 40:651-658
The radical polymerizations of 2-, 3-, and 4-(phenylethynyl)styrenes (1a–c) and the copolymerizations of 1a–c (M1) with styrene (M2) were carried out using AIBN as the initiator in toluene at 60°C. The number-average molecular weights (M ns) wer
Publikováno v:
Macromolecules. 31:3764-3774
The anionic polymerizations of 4-, 3-, and 2-(3,3-dimethyl-1-butynyl)styrenes (3a, 3b, and 3c), 4-, 3-, and 2-(1-hexynyl)styrenes (4a, 4b, and 4c), and 4-(phenylethynyl)styrene (5) were carried out in THF at −78 °C with oligo(α-methylstyryl)dipot
Publikováno v:
Polymer Bulletin. 40:533-540
Chain conformations and molecular motions of poly(4'-ethynylbenzo-15-crown-5) (PEB15C5) and its annealed sample (AN-PEB15C5) in the solid state were investigated by 1 H NMR and CP-MAS 13 C NMR measurements. The chain conformation was determined to be
Autor:
Katsuyuki Tsuda, Takashi Ishizone, Kazuaki Yokota, Toyoji Kakuchi, Wataru Hirahata, Akira Hirao
Publikováno v:
Polymer Bulletin. 39:173-178
The radical polymerizations of 2-, 3-, and 4-(trimethylsilylethynyl)styrenes (1a-c) and copolymerizations of 1a-c (M1) with styrene (M2) have been studied. Copolymerization parameters were determined as r1 = 1.22 and r2 = 0.54 for 1a, r1 = 1.10 and r
Publikováno v:
Macromolecular Chemistry and Physics. 197:1781-1791
Anionic polymerization of 4-(4′-trimethylsilyl-3′-butynyl)styrene (2) was carried out in THF at −78°C for 0.5 h with oligo(α-methylstyryl)lithium, -dilithium, and -dipotassium. Poly(2)s possessing predicted molecular weights and narrow molecu
Autor:
Toyoji Kakuchi, Katsuyuki Tsuda, Takashi Ishizone, Kazuaki Yokota, Seiichi Nakahama, Akira Hirao
Publikováno v:
Macromolecules. 26(25):6985-6991
The anionic polymerizations of 4-(trimethylsilyl)-ethynylstyrene (1), 3-(trimethylsilyl)ethynylstyrene (2), and 2-(trimethylsilyl)ethynylstyrene (3) have been carried out in THF at -78°C with a variety of initators. The monomers are found to undergo
Publikováno v:
Polymer Bulletin. 28:23-28
Polymers with cryptand-like units have been obtained by the radical cyclopolymerization of 4,10-bis(acryloyloxyethyl)- and 4,10-bis(methacryloyloxyethyl)-1,7-dioxa-4,10-diazacyclododecane. The polymers consist of only bicyclic constitutional units, t