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Influence of different nematic crosslinking unit on mesomorphism of side-chain cholesteric elastomers containing menthyl groups

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Abstract

The synthesis of two cholesteric monomers (M1 and M2), nematic crosslinking agent (C1 and C2), and the corresponding side-chain elastomers containing menthyl groups (P1 and P2 series) is described. The mesomorphism was investigated by differential scanning calorimetry, polarizing optical microscopy, X-ray diffraction, and thermogravimetric analysis. The effect of the content of the different nematic crosslinking unit on the mesomorphism of the elastomers was discussed. M1 and M2 showed cholesteric and blue phases; C1 and C2 showed nematic phase. Because of the introduction of the nematic crosslinking unit, elastomers P1-1−P1-5 and P2-1−P2-5 exhibited cholesteric phase. With increasing the content of nematic crosslinking unit, T g of the obtained elastomers revealed an increased tendency, and T i of P1 series firstly increased then decreased, while T i of P2 series decreased the mesomorphism of the corresponding elastomers when the content of nematic crosslinking unit was 12 mol.%.

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Acknowledgement

The authors are grateful to NSFC Grant Nos. 50503005 and 90105001 for financial support of this work.

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Authors and Affiliations

  1. Center for Molecular Science and Engineering, College of Science, Northeastern University, Shenyang, 110004, People’s Republic of China

    Jian-She Hu, Zhi-Wei Song, Cong Liu & Wen-Chang Zhang

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  1. Jian-She Hu
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  2. Zhi-Wei Song
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  3. Cong Liu
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  4. Wen-Chang Zhang
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Correspondence to Jian-She Hu.

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Hu, JS., Song, ZW., Liu, C. et al. Influence of different nematic crosslinking unit on mesomorphism of side-chain cholesteric elastomers containing menthyl groups. Colloid Polym Sci 288, 851–858 (2010). https://doi.org/10.1007/s00396-010-2206-x

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