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Chemistry and Industry of Forest Products ›› 2017, Vol. 37 ›› Issue (6): 28-34.doi: 10.3969/j.issn.0253-2417.2017.06.004

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Effects of Cardanol-based Epoxidized Phosphate on the Properties of E-51/IPDA Epoxy Resin System

HUO Shuping1,2, CHEN Jian1, LIU Guifeng1,2, WU Guomin1,2, KONG Zhenwu1,2   

  1. 1. Research Institute of Forestry New Technology, CAF, Beijing 100091, China;
    2. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SFA;Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
  • Received:2017-04-17 Online:2017-12-25 Published:2018-01-05

Abstract: A cardanol-based phosphate epoxidized(CGEP) was synthesized using cardanol.as feedstock. The curing system of bisphenol A epoxy resin(E-51) and isophorone diamine(IPDA) was modified by CGEP in different mass ratios. The influences of CGEP on the viscosity of E-51 and on the properties of cured epoxy resins were investigated. The microstructure of fracture surface of cured epoxy resins was characterized by scanning electron microscope(SEM). It was found that CGEP has significantly diluted the E-51 and involved in the curing reaction of epoxy resin. When the content of CGEP was 15 wt% with respect to E-51, the impact strength of cured epoxy resins reached the maximum 22.06 kJ/m2. When the content of CGEP was 20% with respect to E-51, the tensile strength and bending strength of cured epoxy resins reached the maximum 96.19 MPa and 99.70 MPa, respectively. With the increase of the amount of CGEP from 0% to 25%, the glass transition temperature(Tg) of the cured product decreased from 144.82℃ to 119.10℃, while the oxygen index increased from 19.0 to 23.0. SEM analysis showed that the toughness of cured epoxy resins improved obviously.

Key words: cardanol, diluent, epoxy resin, curing reaction, mechanical property

CLC Number: