
17: LIQUID CRYSTAL POLYMERS 387
Table 17.3 Dependence of Glass Transition Temper-
ature and Melting Point on Composition
Mol% 4-ABA
a
T
g
(
◦
C) T
m
(
◦
C)
0.35 110 152
0.50 120 152
0.65 112 184
0.75 114 306
0.85 – 334
a
4-ABA: 4-acetoxybenzoic acid, Comonomer: 3-benzoyl-4-
acetoxybenzoic acid.
acid, which is less bulky than 3-benzoyl-4-
acetoxybenzoic acid [22]. Aromatic polyesters are
highly heat resistant due to their high crystallinity.
17.3.3 Electrical and Optical
Properties
The orientation of liquid crystals can be influenced
by an electric field. This property makes LCPs attrac-
tive for LCDs. Some liquid crystals undergo a spon-
taneous electric polarization even ...