Chemistry Reference
In-Depth Information
Figure 5.3 Examples of metal coordination motifs employed for side chain functionalization
of polymers.
commercially because of their unique physical properties such as enhanced impact
strength, toughness, and thermal reversibility (Eisenberg and Kim 1998). Other
examples of coulombic interactions in side chain functionalized polymeric systems
include charged block copolymers (Schaedler et al. 1998), cross-linked polymers
using charge interactions (Ghosh et al. 1998), self-assembled dendrimers (Gittins
and Twyman 2003), coulombically linked side chain liquid crystalline polymers,
and coulombic polyamphiphiles, among others (Vuillaume and Bazuin 2003). The
polymeric scaffold can either be positively or negatively charged; hence, it can be
considered to be a “polyelectrolyte.” The majority of the coulombically functiona-
lized side chain polymers are based on “postpolymerization” functionalizations
because of the often severe interference of the charged coulombic centers during
the synthesis. More recently, with the advent of highly functional group tolerant
yet mild polymerization techniques such as ROMP, there have been reports of
