22 Result(s)

Article

Binding of Bile Salts to an Amphiphilic Polysulfonate Modified with Cholesterol Moieties

A hydrophobically modified polysulfonate bearing a small mole percent (5 mol %) of cholesteryl moieties forms an intermolecularly bridged flower micelle in water, arising from intermolecular associations of th...

Shin-ichi Yusa, Kasumi Ikeda, Tohei Yamamoto, Yotaro Morishima in Polymer Journal (2005)

Article

pH-Responsive Micellization of Amine-Containing Cationic Diblock Copolymers Prepared by Reversible Addition-Fragmentation Chain Transfer (RAFT) Radical Polymerization

A series of poly([3-(methacryloylamino)propyl]trimethylammonium chloride)-block-poly(2-(diethylamino)ethyl methacrylate) (pMAPTACm–DEAEMAn) of different block lengths were prepared by controlled radical polymeriz...

Shin-ichi Yusa, Yoshitane Konishi, Yoshiro Mitsukami, Tohei Yamamoto… in Polymer Journal (2005)

Article

Aggregation Number of Cholesterol Moieties in Hydrophobic Microdomains Formed by Self-Association of a Cholesterol-Bearing Polyelectrolyte in Water

Shin-ichi Yusa, Kasumi Ikeda, Tohei Yamamoto, Yotaro Morishima in Polymer Journal (2002)

Article

Synthesis and Characterization of Self-Associative Perfluoroalkyl-End-Capped Polystyrene

Polystyrene bearing a perfluoroalkyl group at one polymer chain end was synthesized by a “living” radical polymerization of styrene in the presence of 4-perfluoro(n-tetradecanoylamino)-2,2,6,6-tetramethylpiperidi...

Shin-ichi Yusa, Tohei Yamamoto, Akihito Hashidzume, Yotaro Morishima in Polymer Journal (2002)

Article

Optical Anisotropy of Photo-Crosslinkable Polymer Film and Photoalignment Control of Nematic Liquid Crystals Using Nonpolarized Ultraviolet Irradiation

Nobuhiro Kawatsuki, Tohei Yamamoto, Hiroshi Ono in Polymer Journal (1999)

Article

Linearly Polarized Ultraviolet Photoreaction of Poly[6-(4′-cinnamoylbiphenyl-4-yloxy)hexyl methacrylate] and Alignment Behavior of Liquid Crystals on the Resultant Photoreacted Films

Linearly polarized (LP)-ultraviolet (UV) photoreaction of side-chain liquid crystalline polymer of poly[6-(4′-cinnamoylbiphenyl-4-yloxy)hexyl methacrylate] (SLCP 1) and low-molecular-weight (LMW)-LC alignment beh...

Nobuhiro Kawatsuki, Ken Takatani, Tohei Yamamoto, Hiroshi Ono in Polymer Journal (1998)

Article

Radical Polymerization of Monovinyl Sebacate and Poly(vinyl alcohol) from Its Polymer

Ryohei Fukae, Atuo Tamada, Nobuhiro Kawatsuki, Tohei Yamamoto in Polymer Journal (1998)

Article

Preparation of Highly Syndiotactic Poly(vinyl alcohol) by Fractionation

Tohei Yamamoto, Koichi Kawakami, Takeshi Nishikawa, Mitsuhiro Sugimoto… in Polymer Journal (1998)

Article

Poly(vinyl alcohol) with High Diad-Syndiotacticity and High Melting Point

Ryohei Fukae, Tohei Yamamoto, Yasuhiro Fujita, Nobuhiro Kawatsuki… in Polymer Journal (1997)

Article

Synthesis and Photoreaction of Poly[6-(4′-cinnamoylbiphenyloxy)-hexylmethacrylate-co-methylmethacrylate]

Nobuhiro Kawatsuki, Akihiro Kikai, Eiji Moriguchi, Shin-ichi Sakashita… in Polymer Journal (1996)

Article

Solvent Effects on the Radical Polymerization of Vinyl Pivalate

Ryohei Fukae, Koichi Kawakami, Tohei Yamamoto, Osamu Sangen… in Polymer Journal (1995)

Article

Estimation of Sequence Distribution in Poly(vinyl acetate)

Tohei Yamamoto, Teizo Isono, Teruya Matsumoto, Mitsuhiro Sugimoto… in Polymer Journal (1995)

Article

Biodegradation of Poly(vinyl alcohol) with High Isotacticity

A bacterium having biodegrading activity with poly(vinyl alcohol) (PVA) was isolated from an activated sludge sample of a textile dyeing factory which deals with PVA. The bacterium was identified as a strain of P...

Ryohei Fukae, Toshiki Fujii, Masahiro Takeo, Tohei Yamamoto… in Polymer Journal (1994)

Article

Initiation Step of Radical Polymerization of Styrene in Various Non-Aromatic Solvents

Rates of initiation of radical polymerizations (R_i) of styrene by several initiators in non-aromatic solvents were determined and compared with those in benzene. It is considered that by forming π-complex with a ...

Tohei Yamamoto, Jun Takeuchi, Kenji Konishi, Shinji Higashika… in Polymer Journal (1994)

Article

Tacticities of Copoly(vinyl ester)s Obtained by Radical Polymerization

Tacticity simulations of poly(vinyl acetate-co-vinyl propionate) [poly(VAc-co-VPr)], poly(vinyl acetate-co-vinyl decanoate) [poly(VAc-co-VD)] and poly(vinyl acetate-co-vinyl pivalate) [poly(VAc-co-VP)] were tried...

Tohei Yamamoto, Minoru Hanatani, Teruya Matsumoto, Osamu Sangen… in Polymer Journal (1994)

Article

Synthesis of High-Molecular Weight Poly(vinyl alcohol) of Various Tactic Contents through Photo-Emulsion Copolymerization of Vinyl Acetate and Vinyl Pivalate

Photo-emulsion copolymerizations of vinyl acetate (VAc) and vinyl pivalate (VP) were carried out without initiator at 0°C, and copolymers giving high molecular weight poly(vinyl alcohol) (PVA) with various tac...

Tohei Yamamoto, Ryohei Fukae, Tomoaki Saso, Osamu Sangen… in Polymer Journal (1992)

Article

Saponification of High Molecular Weight Poly(vinyl pivalate)

The saponification of high molecular weight poly(vinyl pivalate) (PVP) was examined in several solvents, and PVA of Pn=18000 and 99%DS (degree of saponification) were obtained by saponification in the absence of ...

Tohei Yamamoto, Shuji Yoda, Hirofumi Takase, Tomoaki Saso, Osamu Sangen… in Polymer Journal (1991)

Article

Dynamic Mechanical Behaviors of Poly(vinyl alcohol) Film with High Syndiotacticity

Ryohei Fukae, Tohei Yamamoto, Osamu Sangen, Tomoaki Saso, Takeshi Kako… in Polymer Journal (1990)

Article

High Molecular Weight Poly(vinyl alcohol) through Photo-Emulsion Polymerizations of Vinyl Acetate

A mixture of vinyl acetate, water and polyoxyethylene nonyl phenyl ether sodium sulfate (LWZ; Kao Co.) was irradiated with a high pressure mercury lamp in the absence of initiator at 0°C and high molecular wei...

Tohei Yamamoto, Shigetoshi Seki, Ryohei Fukae, Osamu Sangen… in Polymer Journal (1990)

Article

Preparation and Saponification of High Molecular Weight Poly(vinyl pivalate)

Tohei Yamamoto, Shuji Yoda, Osamu Sangen, Ryohei Fukae, Mikiharu Kamachi in Polymer Journal (1989)