Chiral liquid crystalline thiols for preparation of polybutadiene diols

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Abstract
New chiral thiols possessing biphenyl and phenyl moieties as well as ester linkage groups in the molecular core have been synthesised and grafted on polybutadiene diol backbones. The resulting diols possess OH end groups that enable the possibility for preparation of ordered liquid crystal networks. The mesomorphic properties of the synthesised thiols and resulting diols have been studied by polarising optical microscopy and differential scanning calorimetry. Chiral thiols as well as the resulting side‐chain diols exhibit liquid crystalline behaviour, with a very broad paraelectric smectic A phase. The effects of side‐chain structure of the ester thiols and density of grafting of the polybutadiene diols on mesomorphic properties were determined and are discussed.

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