Ethylene SCLCP

SCLCPs have also been prepared by alkylation and/or quatemization of linear poly (ethylene imine)s [215, 216] and po-ly(4-vinylpyridine)s [217-223] with meso-genic alkyl halides or carboxylic acids. Although these precursor polymers can be prepared by controlled cationic [224] and anionic [225, 226] polymerizations, respectively, living polymerizations were either not used to prepare the SCLCPs, or the mo-... 

Many reviews [1-3] of SCLCPs describe the structure of the backbone (main chain), the spacer (flexible linkage), and the side group (mesogenic unit) of the SCLCP. For example, the most widely used backbones include polyacrylates or polymethacrylates, polysiloxanes, and polyphosphazenes po-ly-ct-chloroacrylates, itaconates, and ethylene oxides have also been reported. 

A great maity SCLCPs have been synthesised because of the combination of the vast number of mesogenic core nnits available from stmctuie-property relationship evaluation of low molar mass liquid crystals and the maity different backbone (BB) types possible e.g., siloxanes, acrylates, methacrylates, ethylenes, epoxides). Additionally, as shown in Figure 5.4, homopolymers (5.4a), SC copolymers (5.4b), BB copolymers (5.4c), and SC/BB copolymers (5.4d) considerably extend the scope of known and potential liquid crystal polymers. 

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