Curing Kinetics and Properties of Epoxy Resin with 1,4-bis(2,4-diaminophenoxy)benzene
来源期刊:Journal Of Wuhan University Of Technology Materials Science Edition2018年第5期
论文作者:虞鑫海 CHEN Shuo 徐永芬
文章页码:1256 - 1262
摘 要:A multifunctional amine, 1,4-bis(2,4-diaminophenoxy)benzene(14 BDAPOB), was prepared and used as a novel hardener for novolac epoxy resin(ER). The structure of 14 BDAPOB was characterized with Fourier transform infrared(FT-IR) spectroscopy and differential scanning calorimetry(DSC). The curing kinetics of the novolac epoxy resin/1,4-bis(2,4-diaminophenoxy)benzene(ER/14 BDAPOB) system was studied by means of non-isothermal DSC experiments at five heating rates and determined by the Kissinger, Ozawa and Crane methods. The results showed that the activation energy Ea of the ER/14 BDAPOB(74.56 kJ/mol) system was higher than that of the epoxy resin/LCA-30(ER/LCA-30, 68.85 kJ/mol), where LCA-30 is a commercial modified diamine. The reaction order, frequency factor and the reaction rate constant at peak temperature of the two systems were calculated. The initial decomposition temperatures(Tonset) were 398.8 ℃(ER/14 BDAPOB)and 334.3 ℃(ER/LCA-30). The tensile shear strengths were 21.63 MPa(ER/14 BDAPOB) and 21.28 MPa(ER/LCA-30). The results showed that the two cured systems exhibited good thermal and mechanical properties.
虞鑫海1,2,CHEN Shuo3,徐永芬1,2
1. College of Chemistry, Chemical Engineering and Biotechnology , Donghua University2. Key Laboratory of High Performance Fibers and Products, Ministry of Education, Donghua University3. College of Material Science and Engineering, Donghua University
摘 要:A multifunctional amine, 1,4-bis(2,4-diaminophenoxy)benzene(14 BDAPOB), was prepared and used as a novel hardener for novolac epoxy resin(ER). The structure of 14 BDAPOB was characterized with Fourier transform infrared(FT-IR) spectroscopy and differential scanning calorimetry(DSC). The curing kinetics of the novolac epoxy resin/1,4-bis(2,4-diaminophenoxy)benzene(ER/14 BDAPOB) system was studied by means of non-isothermal DSC experiments at five heating rates and determined by the Kissinger, Ozawa and Crane methods. The results showed that the activation energy Ea of the ER/14 BDAPOB(74.56 kJ/mol) system was higher than that of the epoxy resin/LCA-30(ER/LCA-30, 68.85 kJ/mol), where LCA-30 is a commercial modified diamine. The reaction order, frequency factor and the reaction rate constant at peak temperature of the two systems were calculated. The initial decomposition temperatures(Tonset) were 398.8 ℃(ER/14 BDAPOB)and 334.3 ℃(ER/LCA-30). The tensile shear strengths were 21.63 MPa(ER/14 BDAPOB) and 21.28 MPa(ER/LCA-30). The results showed that the two cured systems exhibited good thermal and mechanical properties.
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