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- W2059484807 abstract "Several sulfone-containing polyamides were prepared by the direct polycondensation reaction of 4,4′-dicarboxydiphenyl sulfone (DCDPS) with various aromatic diamines by means of triphenyl phosphite in NMP-pyridine solution containing 4 wt % LiCl. DCDPS was synthesized in two steps by the preparation of 4,4′-dimethyldiphenyl sulfone (DMDPS) from toluene and chlorosulfonic acid and subsequent oxidation with an alkaline solution of potassium permanganate. The polyamides were obtained in 85–100% yield and had inherent viscosities in the range 0.42–1.65 dL/g. Their solubility, crystallinity, and thermal properties are also discussed." @default.
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- W2059484807 date "1990-08-01" @default.
- W2059484807 modified "2023-10-17" @default.
- W2059484807 title "Synthesis of sulfone-containing polyamides by direct polycondensation with triphenyl phosphite" @default.
- W2059484807 doi "https://doi.org/10.1002/pola.1990.080280922" @default.
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