Synthesis and Pyrolysis of Soluble Cyclic Hf-Schiff Base Polymers

Yu-Huan Wu; Li Ye; Ya-Nan Sun; Wei-Jian Han; Tong Zhao

doi:10.1007/s10118-021-2566-3

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Synthesis and Pyrolysis of Soluble Cyclic Hf-Schiff Base Polymers

RAPID COMMUNICATION | Updated：2021-04-06

- Synthesis and Pyrolysis of Soluble Cyclic Hf-Schiff Base Polymers
- Synthesis and Pyrolysis of Soluble Cyclic Hf-Schiff Base Polymers
- Chinese Journal of Polymer Science 2021年39卷第6期页码：659-664
- Affiliations：
  
  a.Key Laboratory of Science and Technology on High-tech Polymer Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  b.University of Chinese Academy of Sciences, Beijing 100049, China
- Author bio：
  
  tzhao@iccas.ac.cn
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (No. 21604090). The authors are grateful for helpful advices from Lianjun Zheng and Pingxia Zhang on the manuscript.
- DOI：10.1007/s10118-021-2566-3
  中图分类号：
- 收稿：2020-12-01，
  
  修回：2021-2-4，
  
  录用：2021-2-11，
  
  网络首发：2021-04-06，
  
  纸质出版：2021-04-15
- Accepted：
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Wu, Y. H.; Ye, L.; Sun, Y. N.; Han, W. J.; Zhao, T. Synthesis and pyrolysis of soluble cyclic Hf-schiff base polymers. Chinese J. Polym. Sci. 2021, 39, 659–664

Yu-Huan Wu, Li Ye, Ya-Nan Sun, et al. Synthesis and Pyrolysis of Soluble Cyclic Hf-Schiff Base Polymers[J]. Chinese Journal of Polymer Science, 2021, 39(6): 659-664.
Wu, Y. H.; Ye, L.; Sun, Y. N.; Han, W. J.; Zhao, T. Synthesis and pyrolysis of soluble cyclic Hf-schiff base polymers. Chinese J. Polym. Sci. 2021, 39, 659–664 DOI： 10.1007/s10118-021-2566-3.

Yu-Huan Wu, Li Ye, Ya-Nan Sun, et al. Synthesis and Pyrolysis of Soluble Cyclic Hf-Schiff Base Polymers[J]. Chinese Journal of Polymer Science, 2021, 39(6): 659-664. DOI： 10.1007/s10118-021-2566-3.

摘要

Abstract

Soluble Hf-containing polymers are significant processable precursors for the fabrication of ultra-high temperature ceramics. In this work

cyclic Hf-Schiff base polymers were synthesized

via

direct polymerization of hafnium alkoxide and bis-salen monomers. The defined structure and molecular weight of the polymers were characterized by NMR spectroscopy

gel permeation chromatography and MALDI-TOF mass spectroscopy. The feed ratio of monomers regulated the molecular weight and solubility of the polymers. This synthetic strategy features simple operation under ambient conditions

efficient reaction with high yield and cyclic polymers as the main products. The Hf-Schiff base polymers were converted to HfC/C materials after pyrolysis under argon at 1600 °C

which was identified by XRD measurements

elemental analyses and Raman spectroscopy. This work will inspire more precise and efficient synthesis and applications of metallopolymers.

关键词

Keywords

references

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