| 摘要 |
Polyamides are produced by condensing dicarboxylic acid with aromatic diamine in the presence of carbodiimide as a condensing agent. Dicarboxylic acid is aromatic dicarboxylate, HOOC-X(-COY)m - COOH[X=(m+2) valent, C6-20 carbo ring, C3-20 hetero ring, C2-20 alkyl or alkenyl; Y=-OR or -NRR', R and R' are C5-20 carbo ring, C1-20 hetero ring, C2-12 acyl, C2-12 acyloxy, -0W(W=C1-12 hydrocarbon), -SW or C2-12 acylamino; m=1 or 2; -COY is opt. attached at ortho, beta, gamma position against -COOH!.
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