• Research on the Influence of Cation-π Interactions Formed by Different Metal Cations on the Mechanical Properties of Epoxy Resin

  • Heshuang Li#, Sijie Yin#, Jingya Liu*, Qiaolin Tang, Qiang Peng, Ai Lu**, Yunbo Xu***, JingJin Huang****, and Ming Kang†

  • School of Material and Chemistry, State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, P.R. China
    *Zigong Centre for Disease Control and Prevention, Institute of Physical and Chemical, Zigong 643000, P.R. China **National Key Laboratory of Chemical Explosion Safety, Institute of Chemical Materials,
    China Academy of Engineering Physics, Mianyang, 621900, China
    ***Sichuan Shutai Chemical Technology Co., Ltd, Suining 629399, P.R. China
    ****Sichuan Coremer Materials Co., Ltd., Mianyang 621010, P.R. China

  • 서로 다른 금속 양이온에 의한 양이온-π 상호작용이 에폭시 수지의 기계적 물성에 미치는 영향

  • Reproduction, stored in a retrieval system, or transmitted in any form of any part of this publication is permitted only by written permission from the Polymer Society of Korea.

Abstract

The polymerization of epoxy resin E44 with tryptamine was performed, and cation-π interaction-containing indole epoxy resins were prepared by doping with Na⁺, Mg²⁺, and K⁺, respectively. A structure-property relationship study was conducted. The results indicated that when the IEP to Mg²⁺ doping ratio was 30:1, the modified epoxy resin exhibited optimal mechanical properties, with a tensile strength of 62.88 MPa and a fracture elongation of 9.52%. The cation-π interactions constructed by introducing Na⁺, Mg²⁺, and K⁺ can simultaneously enhance and toughen the material, and significant differences exist in the enhancement and toughening effects of the three cations. There is a certain correlation between the macroscopic enhancement effect and both the cation-π interactions and the intrinsic parameters of the ions.


Keywords: cations-π interaction, epoxy resin, mechanical properties, weak interaction.

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2025 Impact Factor : 1.0
  • Indexed in SCIE

This Article

  • 2026; 50(5): 687-696

    Published online Sep 25, 2026

  • 10.7317/pk.2026.50.5.687
  • Received on Mar 27, 2026
  • Revised on May 24, 2026
  • Accepted on Jun 3, 2026

Correspondence to

  • Ming Kang

  • School of Material and Chemistry, State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621010, P.R. China

  • E-mail: dyw510@126.com