Chemistry Reference
In-Depth Information
Films and fibers from this material exhibit good mechanical properties up to a temperature of
300
C. Above that temperature, however, they degrades rapidly in air [
206
].
Similar polymers are
polybenzoxazoles
[
207
,
208
]:
O
O
H
2
N
NH
2
Cl
Cl
n
+
n
HO
OH
N
N
O
O
n
The same is true of
polybenzthiazoles
[
209
]:
O
O
H
2
N
HS
NH
2
SH
hν
n
+
n
O
O
N
N
n
S
S
Polyoxidiazoles
also belong to this general class of materials [
210
]:
O
O
N
N
n
+
N
H
H
N
N
Cl
Cl
N
n
N
N
O
n
NN
and
polybenztriazoles
[
211
]:
N
N
N
N
+
H
N
N
H
Cl
C
C
Cl
N
N
N
N
N
n
N
N
