A Novel Latent Cyclotriphosphazene-Containing Imidazole Hardener for Epoxy Resins and Its Application in Carbon Fiber Reinforced Composites

摘要：

　　In this work,a latent imidazole hardener(SMICP)for epoxy resins was synthesized by the nucleophilic substitu-tion reaction between 2-methyl imidazolium(2MI)and hexachlorocyclotriphosphazene(HCCP)in the presence of triethyl-amine as acid-binding agent.The chemical structure of SMICP was characterized by Fourier transform infrared spectroscopy(FTIR),nuclear magnetic resonance spectroscopy(NMR),elemental analysis and mass spectroscopy.The SMICP shows excellent latency towards epoxy resins at room temperature compared with 2MI.The results of dynamic mechanical analysis(DMA)measurement indicate that the epoxy resins cured by 3.0 wt%and 3.8 wt%2MI and SMICP show glass transition temperatures of 165℃and 187℃,respectively.Compared with the carbon fiber reinforced composites(CFRCs)based on 2MI-cured epoxy resins,the CFRCs based SMICP-cured epoxy resins show comparable interlaminar shear strength(31.7 MPa),higher flexural strength(615 MPa)and flexural modulus(62.9 GPa).

关键词： Epoxy resins Latency Imidazole hardeners Carbon fiber-reinforced composites

作者: HAN Linda ZHENG Tongtong LIU Wanshuang

作者单位: Center for Civil Aviation Composites,Donghua University,Shanghai 201620,China;College of Textiles,Donghua University,Shanghai 201620,China

会议类型: 国际会议

会议名称: 2021 Sino-Africa International Symposium on Textiles and Apparel (SAISTA2021)(2021中非纺织服装国际论坛)

会议地点: 线上

会议语种:英文

页码: 64-69

在线出版日期: 2021-11-05（万方平台首次上网日期，不代表论文的发表时间）