Liquid crystalline polyimide, change

It is well known that for liquid crystalline molecules like the cyanobiphenyl compounds, physical properties such as the clearing points change regularly depending on whether the number of carbon atoms of the alkyl chain is odd or even. This phenomenon has been explained by the molecular linearity for odd or even carbon numbers of the alkyl chains. A similar phenomenon is observed in the case of polyimide (1) with the alkyl chain structures shown in Fig. 5.2.3 [16,17]. 

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