| Summary: | 碩士 === 國立交通大學 === 應用化學系 === 88 === The goal of this research is focused on the synthesis of side chain liquid crystalline polymers containing thiophene —based mesogens. Three series of new side chain liquid crystalline polymers were prepared according to careful molecular design of polymer backbone, spacer, mesogen and end group. Polymethacrylates is used as the polymer backbone. Three to eleven methylene units are used as flexible spacer. Biphenyl thiophenecarboxylate is designed for the mesogen, and cyano, iodo, methoxy group are designed for the end group. The prepared liquid crystalline monomer were polymerized via radical polymerization. The obtained monomer and polymer were determined by NMR and their mesomorphic properities were determined by DSC, optical polarizing microscope. All three series of monomers and polymers present mesomorphic properties with wide temperature range. The synthesized liquid crystalline polymers have potential applications in the field of stationary phase of column chromatography, and the material of rewritable optical disk.
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