| 摘要 |
<p>PURPOSE:To obtain a wholly aromatic copolyamide being soluble in an organic polar solvent and having good processability, high strength and high modulus, comprising repeating units consisting of specified aromatic dicarboxylic acid residues and specified diamine residues. CONSTITUTION:A wholly aromatic polyamide mainly consisting of repeating units each consisting of a terephthalic acid residue (A) of formula I, a naphthalenedicarboxylic acid residue (B) of formula II (e.g. naphthalene-2,6- dicarboxylic acid residue), an aromatic ether diamine residue (C) of formula III (wherein n<=3), e.g. 4,3'-diaminodiphenyl ether residue, a phenylenediamine residue (D) of formula IV and a 4,4'-diaminobiphenyl derivative residue (E) of formula V (wherein R and R' are the same or different and are each H, alkyl, alkoxy or halogen; and (p) and (q) each <=4), 0.001<=B/(A+B)<=0.7 (A and B are the molar fractions of components A and B, respectively).</p> |
