They investigated the effect of steric hindrance on the LC phase behaviors and thermoresponsive behaviors of P(1-M-2-HEPVTA) and P(2-HPPVTA). Although P(1-M-2HEPVTA) has stronger steric hindrance than that of P(2-HPPVTA), both of the polymers form columnar nematic phases, suggesting little effect on the LC behaviors of the
polymers. However, the thermoresponsive behaviors of the two polymers are dependent
on the steric hindrance.
Cl
CuCl, CuCl 2 , Bipy
Anisole
Cl
x
Cl
x
Cl
x
Cl
y
Cl
Cl
Cl
Cl
Cl
Cl
Cl
I 1
I 2
I3
I 4
I 5
I 6
I 7
I 8
I9
Cl
m
Cl
m
Cl
Cl
n
r
MPCS
MPCS
M P C S
C M S
CMS
=
O
O
O
O
H 3 CO
OCH 3
Scheme 8 Copolymerization mechanism of MPCS and CMS (Mei et al. 2008)
2 Mesogen-Jacketed Liquid Crystalline Polymers: Molecular Design and. . .
49