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Your search keyword '"Tomoyasu Hirai"' showing total 11 results
Start Over Author "Tomoyasu Hirai" Publisher the chemical society of japan
11 results on '"Tomoyasu Hirai"'

4. Hairy Particles Synthesized by Living Anionic Polymerization-induced Self-assembly and Evaluation of Their Nanostructure

Author

Tomoyasu Hirai, Yoshinobu Nakamura, Noboru Ohta, Toshiki Terao, Teruaki Hayakawa, Mikito Yamazaki, Syuji Fujii, and Hibiki Shiraishi

Subjects
Nanostructure, Anionic addition polymerization, 010405 organic chemistry, Chemistry, Polymer chemistry, General Chemistry, Self-assembly, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Living anionic polymerization
Abstract

Hairy particles consisting of polyisoprene-b-polystyrene (PI-b-PS) were synthesized by polymerization-induced self-assembly (PISA) based on a living anionic polymerization method. The molecular agg...

Published
2021

5. Synthesis of Millimeter-sized Polymer Particles by Seeded Polymerization and Their Use as Shape-designable Liquid Marble Stabilizer

Author

Keigo Oyama, Junya Fujiwara, Syuji Fujii, Yuta Asaumi, Yoshinobu Nakamura, Tomoyasu Hirai, Nicolas Vogel, and Marcel Rey

Subjects
chemistry.chemical_compound, Aqueous solution, chemistry, Polymerization, Chemical engineering, Millimeter, Seeding, General Chemistry, Polystyrene, Polypyrrole, Overlayer, Stabilizer (chemistry)
Abstract

Millimeter-sized polystyrene particles coated with a hydrophobic polypyrrole overlayer were successfully synthesized by aqueous chemical oxidative seeded polymerization. The dried particles could e...

Published
2020

6. Anionic Polymerization of Methacrylate-functionalized Ionic Monomers in Ionic Liquid

Author

Atsushi Takahara, Daiki Ihara, Nobuyuki Otozawa, Motoyasu Kobayashi, Toshiki Terao, Masataka Yoshioka, Hiroto Fukuma, Tamio Seko, Yoshinobu Nakamura, Tomoyasu Hirai, Syuji Fujii, Satoshi Kuretani, Raito Kato, and Rio Hamajima

Subjects
chemistry.chemical_compound, Anionic addition polymerization, Monomer, chemistry, Ionic liquid, Polymer chemistry, medicine, Ionic bonding, General Chemistry, Methacrylate, Chloride, medicine.drug
Abstract

Anionic polymerization of methacrylate-functionalized ionic monomers, 2-(methacryloyloxy)ethyltrimethylammonium chloride (MTAC) and 3-(N-2-methacryloyloxyethyl-N,N-dimethyl)ammonatopropanesulfonate...

Published
2020

7. Effect of Polycaprolactone Crystalline Block on Surface Reorganization of a Phosphorylcholine-based Amphiphilic Block Copolymer Surface Modifier

Author

Atsushi Takahara, Tomoyasu Hirai, Yucheng Zhang, and Yuji Higaki

Subjects
Chemistry, Phosphorylcholine, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Block (periodic table), 01 natural sciences, eye diseases, 0104 chemical sciences, chemistry.chemical_compound, Chemical engineering, Polycaprolactone, Amphiphile, Copolymer, sense organs, 0210 nano-technology
Abstract

The surface reorganization behavior of a crystalline ABCBA-type copolymer and a non-crystalline ABA-type copolymer including poly(2-methacryloyloxyethyl phosphorylcholine) was investigated. The crystalline domain in the block copolymer suppressed the surface reorganization when exposed to either hydrophilic or hydrophobic condition.

Published
2018

8. Poly(3,4-ethylenedioxythiophene) Grains Synthesized by Solvent-free Chemical Oxidative Polymerization

Author

Syuji Fujii, Hiroki Inoue, Shinya Higashimoto, Keigo Oyama, Tomoyasu Hirai, Yoshinobu Nakamura, Natsuko Shimogama, Shun Mukai, and Musashi Seike

Subjects
chemistry.chemical_compound, Solvent free, Chemical engineering, PEDOT:PSS, Polymerization, 010405 organic chemistry, Chemistry, General Chemistry, Oxidative phosphorylation, 010402 general chemistry, 01 natural sciences, Poly(3,4-ethylenedioxythiophene), 0104 chemical sciences
Abstract

Poly(3,4-ethylenedioxythiophene) (PEDOT) grains were synthesized by solvent-free chemical oxidative polymerization in one-step and one-pot manner. The resulting PEDOT grains had atypical shapes wit...

Published
2019

9. Separation of Endo-cyclic 2-Methacryloyloxyethyl Choline Phosphate by Anion Exchange Approach

Author

Yuji Higaki, Atsushi Takahara, Masaru Mukai, and Tomoyasu Hirai

Subjects
Ion exchange, Chemistry, Polymer chemistry, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 0210 nano-technology, Ion-exchange resin, Choline Phosphate, Methacrylate, 01 natural sciences, 0104 chemical sciences
Abstract

2-Methacryloyloxyethyl choline phosphate (MCP) was synthesized by a ring-opening reaction of cyclic phosphates with 2-(dimethylaminoethyl methacrylate). The crude MCP consisted of an endo-cyclic de...

Published
2018

10. Water-sliding Property of Polyacrylates with Different Fluoro Side Chains

Author

Tomoyasu Hirai, Katsuaki Miyaji, Atsushi Sakai, Masayuki Haraguchi, David P. Penaloza, Keiji Tanaka, and Masaaki Ozawa

Subjects
chemistry.chemical_classification, Property (philosophy), Chemical engineering, Chemistry, Water sliding, fungi, Side chain, food and beverages, heterocyclic compounds, sense organs, General Chemistry, Polymer, skin and connective tissue diseases
Abstract

The incorporation of fluoro-containing moieties into polymers can significantly change their surface properties. In this study, we synthesized two polyacrylates with different fluoro-containing sid...

Published
2013

11. Surface Segregation of Well-defiedN-Substituted Hyperbranched Polyamides in Linear Polymer Matrix

Author

Keiji Tanaka, Liu Huan, Tomoyasu Hirai, Tsutomu Yokozawa, and Yoshihiro Ohta

Subjects
Surface (mathematics), chemistry.chemical_compound, Matrix (mathematics), chemistry, Linear polymer, Polyamide, Polymer chemistry, Side chain, General Chemistry, Polystyrene
Abstract

Surface segregation of well-defined N-substituted hyperbranched polyamides (HBPA) with various side chain lengths in linear polystyrene matrix was studied. To what extent HBPA was segregated at the...

Published
2011

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