Polyimides and polyamide–imides containing arylene sulfone ether linkages

Authors


  • NCL Communication No. 4465.

Abstract

Polyimides and polyamide–imides containing arylene sulfone ether linkages were synthesized from 4,4′-bis(4-isocyanatophenoxy) diphenylsufone (SPI), 4,4′-bis(3-isocyanatophenoxy) diphenylsulfone (SMI), pyromellitic dianhydride (PMDA), 3,3′,4,4′-benzophenone tetracarboxylic dianhydride (BTDA), and trimellitic anhydride (TMA) using one-step method. The diisocyanates SPI and SMI were synthesized from 4,4′-bis (4-carboxyphenoxy) diphenylsulfone (SPA) and 4,4′-bis(3-carboxyphenoxy) diphenylsulfone (SMA) by a Weinstock-modified curtius rearrangement method. All the polycondensation reactions were carried out in N-methyl-2-pyrrolidone (NMP) and the polymers obtained were characterized by infrared spectroscopy, solution viscosity, elemental analysis, thermogravimetric analysis, differential scanning calorimetry, and X-ray diffraction.

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