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Snail shell-shaped chiral substituted helical polyacetylene: preparation, characterization and infrared emissivity performance

  • Wenting Wu
  • Yuming ZhouEmail author
  • Ran Xu
  • Saichun Hu
  • Yangjin Wu
  • Qiang He
  • Man HeEmail author
  • Xiaohai Bu
  • Qiuli Nan
  • Xiaoming Yang
Polymers & biopolymers
  • 7 Downloads

Abstract

The first snail shell-shaped helical polyacetylenes (SHPAs) were synthesized from the copolymerization between l-serine-grafted propargylamine (LSA) and propargylamine (PA). The novel structure was obtained at the monomer input proportion of 50%. The monomer (LSA) and copolymers (poly(LSAm-co-PAn)) were characterized by 1H nuclear magnetic resonance, Fourier transform infrared spectroscopy, ultraviolet visible spectroscopy, circular dichroism and transmission electron microscopy. The infrared emissivity of poly(LSA50-co-PA50) investigated at 8–14 μm was 0.451, which was much lower than the other copolymers. This was because the poly(LSA50-co-PA50) could form the obvious intramolecular interaction and self-assembled to a snail-shell shape by intermolecular hydrogen bonding in MeOH solution. Meanwhile, the conjugation performance of the main chain was enhanced. Consequently, the abundant hydrogen bonds formed through N–H and C=O bonding and the strong conjugate properties both could decrease the unsaturation degree, as well as change the heat conduction mode in the molecules, thereby reducing the infrared emissivity. This strategy provided a new direction to achieve the controllable infrared stealth.

Notes

Acknowledgements

This work was funded by National Nature Science Foundation of China (51673040, 21878047), Natural Science Foundation of Jiangsu Province (BK20171357, BK20180366), Fundamental Research Funds for Central Universities (2242018k30008), Scientific Innovation Research Foundation of College Graduate in Jiangsu Province (KYCX19_0103), Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (1107047002), and Fund Project for Transformation of Scientific and Technological Achievements of Jiangsu, Province of China (BA2018045).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10853_2019_3880_MOESM1_ESM.docx (1.4 mb)
Supplementary material 1 (DOCX 1430 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Chemistry and Chemical EngineeringSoutheast UniversityNanjingChina
  2. 2.Jiangsu Optoelectronic Functional Materials and Engineering LaboratoryNanjingChina
  3. 3.School of Pharmaceutical and Chemical Engineering, Chengxian CollegeSoutheast UniversityNanjingChina
  4. 4.ZheJiang Ouren New Materials Co., LTDJiashanChina

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