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Synthesis and Characterization of Novel AB and ABA Rod–Coil Block Copolymers

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Abstract

Two series of novel rod–coil block copolymers, poly(ɛ-caprolactone)-b-poly{2,5-bis[(4-methoxyphenyl) oxycarbonyl] styrene} (PCL-b-PMPCS) and poly{2,5-bis[(4-methoxyphenyl) oxycarbonyl] styrene}-b-poly(ɛ-caprolactone)-b-poly{2,5-bis[(4-methoxyphenyl) oxycarbonyl] styrene} (PMPCS-b-PCL-b-PMPCS), were successfully synthesized via atom transfer radical polymerization in chlorobenzene solution using macro-initiator and CuBr/Sparteine complex as catalyst. The results show that the number average molecular weight Mn increased versus the monomer conversion and that the polydispersity Mw/Mn was quite narrow (<1.35), which were the character of controlled polymerization. The structure of the block copolymers was experimentally confirmed by 1H NMR. And the liquid crystalline behavior of them was studied using DSC and POM. The data obtained implied that the block copolymers with low molar percentage of PMPCS block could show Tm of PCL. While only the 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, People’s Republic of China

    Mao Shi, Hailiang Zhang, Jianfang Chen, Xingzhu Wang & Xiayu Wang

Authors
  1. Mao Shi
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  2. Hailiang Zhang
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  3. Jianfang Chen
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  4. Xingzhu Wang
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  5. Xiayu Wang
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Correspondence to Hailiang Zhang.

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Shi, M., Zhang, H., Chen, J. et al. Synthesis and Characterization of Novel AB and ABA Rod–Coil Block Copolymers. J Polym Res 12, 413–420 (2005). https://doi.org/10.1007/s10965-005-3322-z

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  • DOI: https://doi.org/10.1007/s10965-005-3322-z

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