Multiple Effects Tailoring the Self-organization Behaviors of Triphenylene Side-chain Liquid Crystalline Polymers via Changing the Spacer Length

Xiang-Hui Han; Xi-Wen Yang; Sheng Chen; Hang Luo; Dou Zhang; Hai-Liang Zhang

doi:10.1007/s10118-018-2108-9

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Multiple Effects Tailoring the Self-organization Behaviors of Triphenylene Side-chain Liquid Crystalline Polymers via Changing the Spacer Length

ARTICLE | Updated：2021-02-18

- Multiple Effects Tailoring the Self-organization Behaviors of Triphenylene Side-chain Liquid Crystalline Polymers via Changing the Spacer Length
- Chinese Journal of Polymer Science Vol. 36, Issue 8, Pages: 960-969(2018)
- Affiliations：
  
  a.Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province, College of Chemistry, Xiangtan University, Xiangtan 411105, China
  b.State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
- Author bio：
  
  chensheng0729@xtu.edu.cn (S.C.)
  hangluo@cus.edu.cn (H.L.)
- Funds：
- DOI：10.1007/s10118-018-2108-9
  CLC：
- Received：08 November 2017，
  
  Accepted：30 December 2017，
  
  Online First：06 March 2018，
  
  Published：2018-08
- Accepted：
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Xiang-Hui Han, Xi-Wen Yang, Sheng Chen, et al. Multiple Effects Tailoring the Self-organization Behaviors of Triphenylene Side-chain Liquid Crystalline Polymers via Changing the Spacer Length[J]. Chinese Journal of Polymer Science, 2018, 36(8): 960-969.
DOI：

Xiang-Hui Han, Xi-Wen Yang, Sheng Chen, et al. Multiple Effects Tailoring the Self-organization Behaviors of Triphenylene Side-chain Liquid Crystalline Polymers via Changing the Spacer Length[J]. Chinese Journal of Polymer Science, 2018, 36(8): 960-969. DOI： 10.1007/s10118-018-2108-9.

摘要

Abstract

Long-alkyl tail triphenylene (TP) side-chain liquid crystalline polymers (SCLCPs) with different spacer length (P-

-TP

= 2

which is the number of carbon atom in the flexible alkyl spacers) have been successfully synthesized

via

free radical polymerization. The differential scanning calorimetry (DSC)

polarized light microscopy (POM)

ultraviolet-visible spectroscopy (UV-Vis)

wide-angle X-ray diffraction (WAXD) and small-angle X-ray scattering (SAXS) measurements were performed to investigate the influence of multiple effects on the self-organization behaviors of P-

-TP

including steric effect

decoupling effect and

π-π

stacking effect. The experimental results revealed that P-

-TP (

= 2

4) formed the columnar phase which was developed by the TP moieties and the main chain as a whole

suggesting that the side-chains had strong steric effect even though the number of spacer length (

) exceeded 4. In addition

the clearing points (

s) of the polymers were above 300 °C. When

= 6 and 8

the polymers displayed hexagonal columnar phase and exhibited the low

s (91 and 80 °C respectively)

originating from the self-assembly of triphenylene due to the decoupling effect and

π-π

stacking effect. This work offers a viable and inspiring pathway to control the phase transition temperature and phase structure of TP SCLCPs

via

simply tailoring the spacer length and increasing the alkyl tail length of TP.

关键词

Keywords

references

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