
13: ARAMIDS 303
1,4-Bis(4-carboxyphenoxy)naphthalene
C
O
OOHHOO
O
C
2,6-Bis(4-carboxyphenoxy)naphthalene
O
O
C
C
O
O
OH
HO
Figure 13.3 Naphthalene-based diacid monomers
[11].
N
N
C
O
HO
NH
2
NH
2
2,3-Bis(4-aminophenyl)-quinoxaline-6-carboxylic acid
N
N
C
O
HO
O
O
NH
2
NH
2
2,3-Bis(4-aminophenyloxyphenyl)-quinoxaline-6-carboxylic acid
Figure 13.4 Monomers for hyperbranched poly-
(arylamide)s [13].
13.2.2 Acid Route
The preparation of amides via the free acid, diamine
and catalysts, is also referred to as the Yamazaki reac-
tion [17]. Organic phosphor containing compounds,
such as triphenyl phosphite, are used as catalysts. In
addition, in NMP/pyridine solvents, salts such as LiCl
and CaCl ...