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Synthesis and properties of a new side chain liquid crystalline polymer by methathesis polymerization

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Summary

Novel liquid crystalline monomer, 4-methoxybiphenyloxy-(N,N′-dipropargyl)undecane amide, subjected to metathesis reaction with transition metal catalyst systems. It was found that the MoCl5-EtAlCl2 catalyst system was very effective for the cyclopolymerization of the monomer. Resulting polymers exhibited good solubility in common organic solvents such as THF, chloroform, etc. The number-average molecular weight (Mn) values of the polymers were in the range of 0.98x104–1.4x104, relative to polystyrene standard by GPC.

Thermal properties of the monomer and the polymer synthesized were examined by differential scanning calorimetry (DSC) and cross-polarized optical microscopy. The polymer exhibited the enanfiotropic liquid crystallinity and smectic mesophase.

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Authors and Affiliations

  1. Department of Chemistry, Korea Advanced Institute of Science and Technology, 373-1 Kusung-Dong, Yusung-Gu, 305-701, Taejon, Korea

    Sang-Jun Choi & Sam-Kwon Choi

  2. Polymer Materials Laboratory, Korea Institute of Science and Technology, Cheangyangri, P.O. Box 131, Seoul, Korea

    Hyun-Nam Cho

Authors
  1. Sang-Jun Choi
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  2. Hyun-Nam Cho
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  3. Sam-Kwon Choi
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Choi, SJ., Cho, HN. & Choi, SK. Synthesis and properties of a new side chain liquid crystalline polymer by methathesis polymerization. Polymer Bulletin 32, 179–185 (1994). https://doi.org/10.1007/BF00306386

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  • DOI: https://doi.org/10.1007/BF00306386

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