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Synthesis and Characterization of a novel star shaped Rod-Coil Block Copolymer

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Summary

A novel star shaped rod-coil block copolymer, tri-armed star poly (ε-caprolactone)-b-poly {2,5-bis[(4-methoxyphenyl) oxycabony] styrene} [S-(PCL-b-PMPCS)3], was successfully synthesized via atom transfer radical polymerization in chlorobenzene solution using macro-initiator and CuBr/Sparteine complex as catalyst. The results showed that the number average molecular weigh Mn was increased versus monomer conversion, and that the polydispersities Mw/Mn was quite narrow (<1.35), which were the character of controlled polymerization. The structure of the star shaped blcok copolymers was experimentally confirmed by 1H NMR. The liquid crystalline behavior of them was studied using DSC and POM. The star shaped block copolymer with low molar percentage of PMPCS block could show Tm of PCL. And only those copolymers with long rigid segment PMPCS could form liquid crystalline phase which was quite stable with a high clearing point.

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Authors and Affiliations

  1. Institute of Polymer Science, Xiangtan University, Xiangtan, 411105, Hunan Province, China

    Mao Shi, Hailiang Zhang, Jian Chen & Xiayu Wan

  2. Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China

    Qifeng Zhou

Authors
  1. Mao Shi
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  2. Hailiang Zhang
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  3. Jian Chen
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  4. Xiayu Wan
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  5. Qifeng Zhou
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Correspondence to Hailiang Zhang.

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Shi, M., Zhang, H., Chen, J. et al. Synthesis and Characterization of a novel star shaped Rod-Coil Block Copolymer. Polym. Bull. 52, 401–408 (2004). https://doi.org/10.1007/s00289-004-0303-z

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  • DOI: https://doi.org/10.1007/s00289-004-0303-z

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