
2 HIGH PERFORMANCE POLYMERS
N
CH
2
O
N-Epoxypropyl-carbazole
N
CH CH
2
N-Vinylcarbazol
N
O
O
CH CH
2
N-Vinylphthalimide
Figure 1.1 Monomers used for
N
-vinylcarbazole
polymers and copolymers.
1.1.2 Nonlinear Optical Side Chain
Monomers
Multifunctional monomers have been synthesized
whose polymers are exhibiting bothphotoconductivity
and nonlinear optical (NLO) properties [5]. Second-
order optical nonlinearity requires the total system
does not possess a center of symmetry. Therefore, the
monomers have a rather complicated structure. The
functionalities can be introduced by standard reactions
in organic chemistry.
Examples for this type of monomer are metha-
crylic acid