Synthesis of ordered polymer by direct polycondensation. VIII. Ordered polymer from two nonsymmetric monomers

✍ Scribed by Osamu Haba; Hiroshi Seino; Kazutaka Aoki; Kazuyuki Iguchi; Mitsuru Ueda

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 148 KB
• Volume: 36
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19980930)36:13<2309::aid-pola18>3.0.co;2-e

✦ Synopsis

The ordered (-aacdbbdc-) polymer was prepared by the direct polycondensation of a pair of symmetric monomers (XabX), 4,4Ј-(oxydi-p-phenylene)dibutanoic acid (XaaX) and 2-methoxyisophthalic acid (XbbX), with a nonsymmetric monomer (YcdY), 4-aminobenzhydrazide, using the condensing agent diphenyl (2,3-dihydro-2-thioxo-3benzoxazolyl)phosphonate (1). The polymerization was carried out by a one-pot procedure, that is, mixing the dicarboxylic acids, condensing agent 1 and triethylamine in NMP for 2 h at room temperature, followed by the addition of 4-aminobenzhydrazide. This polymerization proceeded smoothly, yielding the ordered polymer with an inherent viscosity of 0.34 dL g Ϫ1 . The microstructure of the ordered polymer was confirmed by comparing the authentic ordered polymer in their 13 C-NMR spectrum.