Abstract
AbstractThe synthesis of a new chiral mesogenic monomer (M1), a nematic monomer (M2), and a series of side chain cholesteric copolymers (P2–P6) containing the mesogenic menthyl groups is described. The chemical structures of the compounds were confirmed by FTIR and 1H NMR. The mesomorphic properties and phase behavior were investigated by differential scanning calorimetry, thermogravimetric analysis, and polarizing optical microscopy. M1 showed an enantiotropic cholesteric phase, and M2 revealed a nematic phase. The homopolymers P1 and P7, respectively, displayed a chiral smectic A (SA) phase and a nematic phase, while the copolymers P2–P6 exhibited the Grandjean texture of the cholesteric phase. Tg, Ti, and ΔT of P1–P7 increased with increasing the concentration of M2 in the polymers. All of the obtained polymers displayed very good thermal stability and the wide mesophase temperature range. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
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