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Two acetylene polymers containing cyanobiphenyl-based mesogens,poly { 10-[ （（4’- cyano-4-biphenylyl ） oxy ） carbonyl] - 1 -decyne } （PA8CN ）, which has a relativelyfiexible polyalkyne backbone, and poly {[4-（（（12-（（4’-cyano-4-biphenylyl）oxy）dodecyl）oxy）ca