Nematogenic side groups

In the side chain liquid crystalline polymers the nematogenic side groups and chiral side groups are attached respectively to a polymer backbone to form a copolymer. They exhibit the cholesteric phase. A typical example is shown below. One is the homopolymer (shown in Figure 6.28) and the other is the copolymer (Figure 6.29). 

An interesting extension of the above results is obtained if, in the siloxane system of Fig. 11, the side group R1 is replaced by a nematogenic side group M3. 

Fig. 15 Schematic phase diagram for mixing the nematogenic side group M3 into the system of Fig. 11 with X=Y=R2. The two compositions investigated are indicated by vertical lines and designated as E70/30 and E60/40, respectively, where the numbers give the percentage R2/M3. In the same terminology El00/...

LC Copolymers Containing Both Nematogenic (or Smectogenic) and Active Side Groups... 

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