| Project/Area Number |
01550706
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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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 | Facluty of Engineering, Yamagata University |
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Principal Investigator |
UEDA Mitsuru Faculty of Engineering, Yamagata University, 工学部, 教授 (20007199)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1990: ¥200,000 (Direct Cost: ¥200,000)
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| Keywords | Chemoselctive / Polyamide / Activating Agent / Decarboxylic Acids / Diamines / Aminolysis / Acidity / Direct Polycondensation / ジミアン |
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| Research Abstract |
A convenient method for the synthesis of polyamides containing hydroxyl, amino, and carboxyl substituents on the aromatic rings of the backbones has been developed. These polymers were prepared readily by the chemoselctive polyamidation of dicarboxylic acids with diamines containing various functional groups using the activating agent diphenyl-(2,3-dihydro-2-thioxo-3-benzoxazolyl) phosphonate. The direct polycondensation (one-step) of 5-hydroxy or 5-aminoisophthalic acid with diamines proceeded smoothly under mild conditions and produced the desired polyamides with inherent viscosities up to 0.92 dl/g. Furthermore, the carboxyl substituted polyamides from dicarboxylic acids and 3, 5-diaminobenzoic acid were prepared by the two-step procedure. The model reaction was studied in detail to demonstrate the feasibility of the chemoselective polyamidation.
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