Synthesis and characterization of bio-based epoxy thermosets using rosin-based epoxy monomer

编号 020029502

推送时间 20210614

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Synthesis and characterization of bio-based epoxy thermosets using rosin-based epoxy monomer

来源期刊 Iranian Polymer Journal?

期 第295期

发表时间 20210518

关键词 Rosin;  Tung oil;  Epoxy;  Curing behavior;  Thermosets; 

摘要 Acrylicpimaric acid-based epoxy (APA-based epoxy) and tung oil maleic anhydride (TMA), as a curing agent, were synthesized and used to prepare fully bio-based cured epoxies. The chemical structure was characterized by FTIR and H-1 NMR spectroscopy techniques. The effects of using APA-based epoxy to replace DER332 epoxy were investigated. The curing behavior, dynamic?mechanical properties,?mechanical properties,?thermal stability?and fracture surface were studied using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), a universal testing machine, thermogravimetric analysis (TGA) and scanning electron microscope (SEM). The activation energy (E-a) of the curing process of the APA-based epoxy with TMA was 69.45 kJ/mol, which was almost the same as the E-a of the curing of DER332 process with TMA. Because of the rigidity of the hydrogen phenanthrene ring structure in the APA-based epoxy was higher than that of bisphenol A structure in DER332, the glass transition temperature (T-g) of the cured APA-based epoxy was 21 degrees C higher than that of the cured DER332 epoxy. The tensile strength, Young's modulus and the peak temperature of the weight loss rate (T-max) of cured APA-based epoxy were higher than those of the cured DER332 epoxy. With a decrease in the APA-based epoxy content, the fracture surfaces of the cured APA-epoxy were much rougher. The cured APA-based epoxy exhibited higher storage modulus and Young's modulus than the cured?resins?that were formed from flexible monomers. Therefore, the APA-based epoxy showed great potential to replace DER322 epoxy in preparing cured epoxies.

服务人员 尚玮姣

服务院士 宋湛谦

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