Abstract
AbstractFour polymers (P0–P3) containing peptide chain as polymer backbone were synthesized by condensation reaction with bis(trichloromethyl)carbonate and triethylamine. The chemical structures of the monomers M0–M3 were confirmed by FTIR and 1H‐NMR. The structure–property relationships of the monomers and polymers are discussed. Their phase behavior and optical properties were investigated by differential scanning calorimetry, thermogravimetric analysis, and polarizing optical microscopy. Monomers M1–M3 and polymers P1–P3 displayed cholesteric phases. The results demonstrated that the melt temperature and clear point of monomers (M1–M3) and polymers (P1–P3) decreased with the increase of the flexible spacer length in the side‐chain, and the mesophase temperature range of the polymers increased with the increase of the flexible spacer length. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007
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