
324 HIGH PERFORMANCE POLYMERS
Figure 14.4 Synthesis of a non-coplanar
diimide-diacid monomer [28].
H
2
N
CF
3
NH
2
F
3
C
CH
3
H
3
C
O
O
OS
SO
OH
HO
H
3
C
CH
3
Cl NO
2
F
3
C
O
O
O
HOOC
N
O
O
HOOC
CF
3
F
3
C
CH
3
H
3
C
O
O
OS
COOH
O
O
N
polymerization reaction at room temperature in a non-
aqueous polar solvent such as DMAC [9].
The low-temperature precipitating polymerization
method comprises the polymerization reaction in an
organic solvent which is sparingly soluble in water,
such as methyl ethyl ketone, and in an aqueous solvent
by using triethylamine as an acid acceptor. This reac-
tion is a kind of interfacial polymerization method [6].
14.2.3 Direct Polymerization Route
The direct polymerization method ...