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New side chain liquid crystal aliphatic polycarbonate with pendant functionalized diosgenyl groups: I. Synthesis and mesomorphism

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Abstract

A new side chain liquid crystal aliphatic polycarbonate bearing side-functionalized diosgenyl mesogen, well-defined amphiphilic block copolymer mPEG 43 - b -P(MCC-DHO) 11 was synthesized through the ring-opening polymerization and coupling reaction. The chemical structures and average molecular weights of the monomers and copolymers obtained in this study were characterized using Fourier transform infrared (FT-IR), proton nuclear magnetic resonance (1H NMR) spectrum, and gel permeation chromatographic (GPC) measurement. Their mesomorphism was investigated with differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and variable-temperature x-ray diffraction (XRD) measurement. As a result, the monomer DHO and copolymer mPEG 43 - b -P(MCC-DHO) 11 all exhibited fan-shaped texture of a smectic A (SmA) phase on heating and cooling cycles. Furthermore, mPEG 43 - b -P(MCC-DHO) 11 revealed a LC state at body temperature. In addition, XRD suggested that mPEG 43 - b -P(MCC-DHO) 11 showed a SmAd phase and exhibited interdigitated packing of side chains.

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Acknowledgments

This work was supported by the Science and Technology Committee of Liaoning Province (2013020103), Science and Technology Bureau of Shenyang (F14-231-1-05), and Fundamental Research Funds for the Central Universities (N130205001 and N140502001).

Conflict of interest

No potential conflict of interest was reported by the authors.

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Authors and Affiliations

  1. Center for Molecular Science and Engineering, College of Science, Northeastern University, Shenyang, 110819, People’s Republic of China

    Daoshu Yao, Pan Li, Xiaofeng Liu & Jianshe Hu

  2. Key Laboratory of Reproductive Health, Liaoning Research Institute of Family Planning, Shenyang, 110031, People’s Republic of China

    Liqun Yang

Authors
  1. Daoshu Yao
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  2. Pan Li
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  3. Xiaofeng Liu
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  4. Jianshe Hu
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Correspondence to Jianshe Hu.

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Yao, D., Li, P., Liu, X. et al. New side chain liquid crystal aliphatic polycarbonate with pendant functionalized diosgenyl groups: I. Synthesis and mesomorphism. Colloid Polym Sci 293, 3049–3059 (2015). https://doi.org/10.1007/s00396-015-3750-1

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