Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (4): 20220621.doi: 10.7503/cjcu20220621

• Polymer Chemistry • Previous Articles     Next Articles

Fabrication and Properties of Rosin-based Epoxy Vitrimer with Dual Dynamic Covalent Bonds

ZENG Yanning(), YANG Bin, YUAN Rongyan, LUO Zhaoyi   

  1. College of Material Science and Engineering,Guilin University of Technology,Guilin 541004,China
  • Received:2022-09-19 Online:2023-04-10 Published:2022-12-02
  • Contact: ZENG Yanning E-mail:ynzeng@glut.edu.cn
  • Supported by:
    the Natural Science Foundation of Guangxi, China(2018GXNSFBA281121);the Guangxi “Hundred Talents” Overseas High-level Talent Introduction Project, China

Abstract:

Herein, rosin-based epoxy vitrimers(RE) with dual-dynamic covalent bonds (disulfide bond and ester bond) were fabricated by epoxy-carboxylic acid reaction with rosin derivative as an epoxy monomer, 3,3'-dithiodipropionic acid(DTDPA) as crosslinker. The structures of the RE networks were characterized by Fourier transform infrared spectroscopy(FTIR) and Raman spectroscopy, and the results indicated that rosin-based epoxy networks with dynamic disulfide bond and ester bond were successfully synthesized. Meanwhile, the thermo-mechanical properties, mechanical properties, thermal stability, and stress relaxation of the RE were investigated by dynamic mechanical analysis(DMA), tensile testing, and thermogravimetric(TG) analysis. Furthermore, the effects of DTDPA content on self-healing and reprocessing capabilities of the RE networks were researched. The results show that the Rosin-based epoxy vitrimer which was prepared at a molar ratio of carboxyl in DTDPA/epoxy groups in rosin monomer=100∶100(RE-100) possess the excellent self-healing and reprocessing capabilities due to the most dynamic disulfide bonds and ester bonds in the network.

Key words: Rosin, Epoxy vitrimer, Self-repairing, Reprocessing

CLC Number: 

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