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《Journal of Forestry Engineering》 2018-01
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Synthesis and property investigation of dimer acid/adduct of myrcene and maleic anhydride copolyamide

YANG Xiaohua;LI Shouhai;ZHANG Yan;XIA Jianling;Institute of Chemical Industry of Forestry Products,CAF,Key Lab.of Biomass Energy and Material,Jiangsu Province,Key and Open Lab .of Forest Chemical Engineering,SFA ,National Engineering Lab .for Biomass Chemical Utilization;Institute of Forest New Technology,CAF;  
The reactive copolyamide curing agent( CPA) was prepared from adduct of myrcene and maleic anhydride( AMMA),dimer acid( DA) and triethylenetetramine( TETA) by conventional polycondensation mechanism,and its structure was characterized by Fourier transform infrared spectroscopy( FT-IR) and1 H NMR. The gel times at different temperatures,mechanical properties and heat resistance property of commercial diglycidyl ether of bisphenol A epoxy resin( E-51) cured by CPA with equivalent molar ratio were investigated. The results showed that the optimal ratio of m( DA) to m( AMMA) was 7 ∶ 3 when both viscosity and performance were considered. Compared with the properties of the cured product of commercial polyamide prepared from C36 dimer acid and TETA,the apparent activation energy( Ea) of E-51/CPA calculated by Arrenhinus equation was a little lower,and the curing reactivity was a little higher. In addition,the cross-link density and rigidity of the cured products of epoxy resin increased by the introduction of AMMA in DA during the preparation of copolyamide,and the tensile strength,tensile modulus,flexural strength and compressive strength all increased. The breaking elongation decreased by 23.2%,but it could still reach3.47%. The glass transition temperature( Tg) increased by 38.8%,and in the higher range of temperature( 60-90℃)the steel-steel shear strength increased from 13.92 MPa to 21.68 MPa. In a word,the E-51/CPA curing system has better comprehensive performance.
【Fund】: “十二五”科技支撑计划项目(2015BAD15B04);; 中国林科院林产化学工业研究所研究团队建设创新工程项目(LXSXKQ3)
【CateGory Index】: TQ317
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