M. Ueda, H. Sugiyama
1994
Citations
0
Influential Citations
16
Citations
Journal
Macromolecules
Abstract
Ordered (-aadcbbcd-) polyamides were prepared by the direct polycondensation of a pair of symmetric monomers (XabX), bi(2,4,6-trichlorophenyl) isophthalate or bis(2,4,6-trichlorophenyl) adipate (XaaX) and 5-nitroisophthalic acid (XbbX), with a nonsymmetric monomer (YcdY), 4-aminobenzohydrazide, using the activating agent diphenyl (2,3-dihydro-2-thioxo-3-benzoxazolyl)phosphonate. The polycondensation was carried out by mixing the monomers all at once, yielding the ordered polyamide with inherent viscosities up to 0.30 dL/g. The authentic ordered and random polyamides were prepared to verify the structures of ordered polyamide