China Plastics ›› 2025, Vol. 39 ›› Issue (2): 67-71.DOI: 10.19491/j.issn.1001-9278.2025.02.012

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Preparation of soybean oil reactive diluent and its effect on mechanical properties of epoxy resin

ZHANG Xinyue1, YANG Mingzhao1, LI Congcong1, SU Baoshan1, LI Huanhuan1, GAO Baoshan1(), SHU Zuju1,2()   

  1. 1.School of Materials and Chemistry,Anhui Agricultural University,Hefei 230036,China
    2.Anhui Engineering Research Center for Highly Functional Fiber Products for Automobiles,Hefei 230036,China
  • Received:2024-05-05 Online:2025-02-26 Published:2025-02-27

Abstract:

In this study, the fatty acid isobutylene ester (MO) was prepared by using soybean oil and isobutylene as raw materials, and then a highly active soybean oil⁃based reactive diluent (EMO) was synthesized through an epoxidation reaction using m⁃chloroperoxybenzoic acid as an oxidant. Then, the resultant EMO was added to epoxy resin to prepare compounding materials. The effects of transesterification reaction time, alcohol⁃oil ratio, catalyst ratio and reaction temperature on the conversion rate of MO and the effects of EMO and epoxy resin mixing ratio on the flexural properties of the as⁃prepared compounding materials were investigated. The results indicated that the conversion rate of MO reached 96.56 % at an optimal reaction time of 20 min for the transesterification reaction, a mass ratio of alcohol to oil of 7/1, a catalyst concentration of 0.6 wt%, and a reaction temperature of 70 ℃. The flexural strength of epoxy compounding materials increased at first and then tended to decrease with an increase in the EMO content. The epoxy compounding materials exhibited the highest flexural strength of 103.90 MPa at an EMO content of 10 wt%. Their flexural modulus decreased with an increase in the EMO content, but their toughness tended to increase.

Key words: soybean oil, transesterification, reactive diluent, flexural property

CLC Number: