| Project/Area Number |
16K14010
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Polymer chemistry
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| Research Institution | Waseda University |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 高分子合成 / 高分子構造・物性 / 機能性高分子 / 錯体触媒 / 酸化重合 / エンジニアリングプラスチック / 透明樹脂 / 屈折率 |
|---|
| Outline of Final Research Achievements |
Polymerization of diphenyl disulfide (PhSSPh) proceeded in the presence of vanadyl complexes to catalyze the oxidation of PhSSPh with oxygen. Because water decomposed the active form of the catalyst, pricy strong acid anhydrides have been regarded as essential. We solved this problem using molten PhSSPh as the monomer, where the eliminated water was removed by evaporation. This led to the establishment of the process to yield highly pure and high molecular-weight PPS. Calculation results suggested the terminal disulfide functionality, based on the comparison of the HOMO levels and the shapes of their lobes. The reaction was expanded to those with many kinds of diaryl disulfides to yield poly(1,4-arylene sulfide)s (PAS), typically for those containing methyl groups at the phenyl ring. The PAS, derived from bis(3,5-dimethylphenyl) disulfide, showed a high glass transition temperature with the capability of wet processing by virtue of the enhanced solubility in common organic solvents.
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