10 Result(s)
within
Seiichi Nakahama
English
-
Article
Electrolytic Polymerization of Tetrahydrofuran
The electrolytic polymerization of tetrahydrofuran (THF) was carried out in bulk by using tetrabutylammonium perchlorate as an electrolyte. Poly-THF was obtained from the anolyte. The yield of the polymer incr...
-
Article
Electrochemical Oxidation of Polymer Anions and Arene Anions
In order to investigate the reactivity of carbanions in anionic polymerizations, oscillopolarographic measurements of oxidation potentials of polymer anions and arene anions were carried out in tetrahydrofuran...
-
Article
Anode-Initiated Polymerizations of Olefins and Tetrahydrofuran
The electrolytic polymerization of methyl methacrylate (MMA), styrene and tetrahydrofuran (THF) at the anode was investigated by using (C4H9)4NClO4 and (C4H9)4NPF6 as supporting electrolytes. These polymerization...
-
Article
The Polymer Effect. I. The Acceleration Effect of Poly(vinylpyrrolidone) on a Williamson’s Reaction
The additive effect of poly(vinylpyrrolidone) (PVPD) to a Williamson’s reaction, ether synthesis from sodium phenoxide and n-butyl bromide, in dioxane—ethanol mixed solution at 45°C has been investigated, and com...
-
Article
Catalysis by Cross-Linked Cationic Polymers. I. The Decarboxylation of 6-Nitrobenzisoxazole-3-carboxylate Anion Catalyzed by Cross-Linked Polystyrene Resins Having Quaternized Ammonium Chloride
Catalysis by cationic polyelectrolytes of the decarboxylation of 6-nitrobenzisoxazole-3-carboxylate anion was studied in a buffer solution. The polyelectrolytes used were insoluble cross-linked styrene–divinyl...
-
Article
Hydrophobicity and Dynamic Characteristics of Cross-Linked Polystyrene Gels Studied with Fluorescent Probes
The hydrophobicity and dynamic characteristics of cross-linked polystyrene gels with quaternary ammonium groups (PSQA) have been studied from the fluorescence spectra and depolarization of 6-p-toluidino-2-naphtha...
-
Article
Side-Chain Liquid Crystal Block Copolymers with Well-Defined Structures Prepared by Living Anionic Polymerization I. Thermotropic Phase Behavior and Structures of Liquid Crystal Segment in Lamellar Type of Microphase Domain
We have synthesized the A-B block copolymer with polystyrene as A segment and side-chain liquid crystal (LC) polymer as B segment by a sequential living polymerization. The copolymers were successfully prepare...
-
Article
A Study of Three-Phase Structures in ABC Triblock Copolymers
The microdomain structure of an ABC triblock copolymer consisting of poly(2-hydroxyethyl methacrylate), poly(tert-butyl methacrylate) and poly(2-(perfluorobutyl) ethyl methacrylate) was investigated by means of s...
-
Article
Anionic Polymerizations of Perfluoroalkyl Methacrylates and Synthesis of Well-Defined ABC Triblock Copolymers of Methacrylates Containing Hydrophilic, Hydrophobic, and Perfluoroalkyl Groups
Anionic polymerizations of three perfluoroalkyl methacrylates, 2,2,2-trifluoroethyl- (1), 2-(perfluorobutyl)ethyl- (2), and 2-(perfluorooctyl)ethyl methacrylates (3), were carried out in THF at −78 °C for 1 h wit...
-
Article
Chain End Group-Induced Surface Ordering in Poly(styrene-b-4-vinylpyridine) Symmetric Diblock Copolymer Films
The proton-terminated and fluoroalkyl-terminated poly(styrene-b-4-vinylpyridine) [P(St-b-4VP)] symmetric diblock copolymers were synthesized by a sequential anionic polymerization. The surface chemical compositio...
