Welcome to Chemistry and Industry of Forest Products,

Chemistry and Industry of Forest Products ›› 2021, Vol. 41 ›› Issue (1): 7-14.doi: 10.3969/j.issn.0253-2417.2021.01.002

Previous Articles     Next Articles

Preparation and Properties of Maleopimaric-based Epoxy Nanocomposite

Pan TAO(), Chengyu WU, Shiying MAO, Meixin WANG, Jian LI()   

  1. College of Forestry, Northwest A & F University, Yangling 712100, China
  • Received:2020-08-23 Online:2021-02-28 Published:2021-03-03
  • Contact: Jian LI E-mail:taopan@nwsuaf.edu.cn;ericlee99@nwsuaf.edu.cn


Maleopimaric anhydride(MPA) was prepared from rosin by Diels-Alder addition, and then maleopimaric epoxy resin(MPA-ER) was prepared by esterification and closed-loop reaction. The structures of MPA and MPA-ER were characterized by FT-IR and 1H NMR.A series of MPA-ER/MWCNTs composites were prepared by blending multi-wall carbon nanotubes(MWCNTs) with MPA-ER, the mechanical and thermal properties of the composites were characterized, and the effects of MWCNTs addition on the mechanical and thermal properties of maleopimaric epoxy nanocomposites were investigated. The results of FT-IR and 1H NMR showed that MPA and MPA-ER were successfully prepared. MWCNTs were well dispersed in MPA-ER, and the cross-section had river-shaped texture features. The mechanical properties of MPA-ER/MWCNTs were significantly improved by adding MWCNTs. When the addition of MWCNTs was 1.2%(calculated by the mass of MPA-ER, similarly hereinafter), the mechanical properties of the composite MPA-ER/MWCNTs(1.2) were optimized. Its impact toughness, tensile strength, bending strength and elongation at break were 15.11 kJ/m2, 40.42 MPa, 105.45 MPa and 14.80%, which increased by 159%, 160%, 102% and 135% compared with those of MPA-ER, respectively.At the same time, in cone calorimeter test, the peak heat release rate and carbon residue rate of MPA-ER/MWCNTs(1.2) composite were 324 kW/m2 and 9.18%, respectively.Compared with MPA-ER, the peak heat release rate decreased by 14%, and the carbon residue rate increased by 68%, which indicated that the addition of MWCNTs also improved the thermal stability and flame retardancy of MPA-ER/MWCNTs.The improvement of flame retardancy of MPA-ER/MWCNTs(1.2) composites was mainly attributed to the effective increase of crosslinking density of epoxy resin by adding MWCNTs, and forming a relatively dense carbon layer in the interior of epoxy resin, and then the flame retardant effect was achieved by partially isolating the external heat and air.

Key words: rosin, epoxy resin, carbon nanotube, composites, flame retardance

CLC Number: