Two broad groups of organosilicon polymers are reviewed, presenting different structural features. Some polysiloxanes and polysiloxanes, referred often to as condis crystals, do not contain any architectural elements of rigid rod- or disc-like type moieties, despite the fact, that these flexible chain polymers show an interesting mesomorphic behavior and generate columnar mesophase. The second group involves macromolecules with mesogens incorporated into main or side polymer chains. The advantage of using inorganic flexible backbones lies in lowering phase transition temperatures compared to many organic polymer systems.
Wlodzimierz A. Stanczyk,
"Mesomorphic organosilicon polymers", Proc. SPIE 3319, Liquid Crystals: Chemistry and Structure, (1 January 1998); doi: 10.1117/12.301286; https://doi.org/10.1117/12.301286