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Chemistry and Industry of Forest Products ›› 2020, Vol. 40 ›› Issue (4): 57-62.doi: 10.3969/j.issn.0253-2417.2020.04.008

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Curing Kinetics and Properties of Anhydride Epoxy Curing Agent Based on Ethyl Cellulose-maleopimaric Acid Ester

Yuling QIU1,2,Xiaoliang GUO1,2,Chuanwei LU1,2,Chunpeng WANG1,2,Jifu WANG1,2,*(),Fuxiang CHU1,2   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2020-02-13 Online:2020-08-28 Published:2020-08-21
  • Contact: Jifu WANG E-mail:wjf118@126.com


The ethyl cellulose maleopimaric acid ester (EC-g-MPA) was synthesized by grafting maleopimaric acid (MPA) onto the cellulose backbone(EC). Then, a series of epoxy resin polymers(EC-g-MPA/ER) were prepared via curing reaction between EC-g-MPA, acting as acid anhydride epoxy resin curing agent, and epoxy resin(ER). FT-IR was carried out to confirm the chemical structure of the products. And non-isothermal DSC was carried out to investigate the curing kinetics of the curing system. The results showed that the FT-IR characteristic absorption peak attributed to anhydride disappeared completely after curing. The activation energy of the curing system was 73.94 kJ/mol, the pre-factor(A) of the curing system was 1.27×106 s-1, and the reaction order(n) was 0.9, indicating the curing reaction was a complex process. The thermodynamic performance study showed that the glass transition temperature of the product gradually increased with the increase of EC-g-MPA content, and the cured resin also showed excellent thermal stability. Mechanical properties study showed that the mechanical strength of the cured product increased with the increase of EC-g-MPA content, and the epoxy resins with different mechanical properties could be prepared by tuning the content of the curing agent.

Key words: ethyl cellulose, rosin, anhydride curing agent, epoxy resin, curing kinetics

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