| Project/Area Number |
04555223
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
高分子合成
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| Research Institution | Waseda University |
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Principal Investigator |
TSUCHIDA Eishun Prof., Dept.Polym.Chem., Waseda Univ., 理工学部, 教授 (90063461)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Kimihisa Research Fellow, Res.Inst.Prod.Develpmt., 研究員 (80220458)
NISHIDE Hiroyuki Prof., Dept.Polym.Chem., Waseda Univ., 理工学部, 教授 (90120930)
寺境 光俊 学振特別研究員, 研究員
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| Project Period (FY) |
1992 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥18,900,000 (Direct Cost: ¥18,900,000)
Fiscal Year 1994: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1993: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1992: ¥15,400,000 (Direct Cost: ¥15,400,000)
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| Keywords | Oxidative polymerization / Poly (arylene thioether) / Sulfonium cation / Arylene disulfide / PPS / Engineering plastic / Vanadyl complex / Oxygen oxidation |
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| Research Abstract |
Diphenyl disulfide (DPS) which has been a non-polymerizable monomer is oxidatively polymerized via cationic active species to yield poly (p-phenylene sulfide) (PPS). Oxidation of DPS in acidic media resulted in the formation of phenylbis (phenylthio) sulfoniumcation, which substitutes electrophilically on the phenylene ring of sulfides. The electrophilic substitution and the oxidation are continuously repeated to yield pure and linear PPS.In the presence of a catalytic amount of vanadium complexes, O_2-oxidative polymerization of DPS proceeds through two-electron transfer under the atmosphere at room temperature. A new one-pot synthesis of PPS was also established as a method by using more simple row materials, such as p-xylene and sulfur chloride, as a monomer. The polymerization is applicable to synthesize a variety of new poly (arylene sulfide)s which bear high performances.
In this research project, we found a new reaction that methyl phenyl sulfide was oxidatively polymerized to yield poly (phenylsulfonium cation), which is soluble in common organic solvent at room temperature. The polysulfonium is feasible to convert to the corresponding polythioether with a high molecular weight and a high melting temperature.
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