Chin. J. Org. Chem. ›› 2017, Vol. 37 ›› Issue (7): 1870-1876.DOI: 10.6023/cjoc201612043 Previous Articles     Next Articles



吴义维, 范海波, 杨荣杰   

  1. 北京理工大学材料学院 国家阻燃材料工程技术研究中心 北京 100081
  • 收稿日期:2016-12-14 修回日期:2017-01-20 发布日期:2017-03-03
  • 通讯作者: 杨荣杰
  • 基金资助:


Nitration Study of Cyclic Ladder Polyphenylsilsesquioxane

Wu Yiwei, Fan Haibo, Yang Rongjie   

  1. School of Materials Science & Engineering, National Engineering Technology Research Center of Flame Retardant Materials, Beijing Institute of Technology, Beijing 100081
  • Received:2016-12-14 Revised:2017-01-20 Published:2017-03-03
  • Contact: 10.6023/cjoc201612043
  • Supported by:

    Project supported by the International Science&Technology Cooperation Program of China (No.S2014ZR0465) and the National Natural Science Foundation of China (No.51273023).

How to promote polyhedral oligomeric silsesquioxanes (POSS) compatibility with polymers is always the key point of the research on POSS. Introduction of nitro groups into the POSS by nitration is an important method for improving the compatibility between POSS and other polymers. GPC, TGA, 1H NMR, FTIR and element analysis were used to characterize the structures of the products nitrated from cyclic ladder polyphenylsilsesquioxane (CL-PPSQ) by several kinds of nitration agents, including fuming nitric acid, HNO3-H2SO4, KNO3-H2SO4 and HNO3-(CH3CO)2O. The results showed that NO2-CL-PPSQ was prepared using 75% HNO3-(CH3CO)2O through a moderate nitration process, meanwhile the cyclic structure of PPSQ was remained, and NO2-CL-PPSQ of one nitryl group on every phenyl could be prepared. At the same time, the nitration mechanisms using different nitration reagents were analyzed. NO2+, which broke the chemical structure of CL-PPSQ, could be found in the fuming nitric acid and H2SO4-HNO3 (KNO3) systems. With regard to the HNO3-(CH3CO)2O system, the main activator was CH3COONO2 which had appropriate nitration ability. In brief, cyclic ladder polynitrophenylsilsesquioxanes have good solubility in organic solvent, good dispersion in the resin matrix and nitro groups with reaction activity at the same time. The successful synthesis of this polymer provides a precursor for subsequent amination, alkynyl, azide reaction.

Key words: inorganic-organic hybrid materials, cyclic ladder polyphenylsilsesquioxane, nitration mechanism