A novel bio-based, flame retardant and latent imidazole compound-Its synthesis and uses as curing agent for epoxy resins

编号 020036101

推送时间 20220919

研究领域 林产化工 

年份 2022 

类型 期刊 

语种 英语

标题 A novel bio-based, flame retardant and latent imidazole compound-Its synthesis and uses as curing agent for epoxy resins

来源期刊 JOURNAL OF APPLIED POLYMER SCIENCE

期 第361期

发表时间 20220901

关键词 flame retardance;  mechanical properties;  resins;  synthesis and processing techniques;  thermal properties; 

摘要 Composite industry is constantly seeking multifunctional, high performance and environmentally friendly materials. Herein reported is a novel bio-based, flame retardant and latent epoxy curing agent synthesized from wood vanillin, phosphate ester and imidazole. Experiment data from combustion test demonstrated that the cured epoxy resin with this new curing agent, designated as VAIP, rendered effective flame retardant property with limit of oxygen of 38.4%, UL-94 V-0 rating, total heat release of 48 MJm(-2) and peak heat release rate of 435 KWm(-2). Thermal mechanical tests showed its significantly higher char yield of 35% at 800 degrees C and thermal stability with the temperature of initial weight loss rate of above 350 degrees C, compared to reference epoxy resins cured by conventional cyano-imidazole (CEMI). This new phosphorus containing imidazole curing agent also demonstrated potential application in fiber-reinforced composite by rendering comparable Tg, for both dry and hot-wet conditions, as well as higher interlaminar and shear strengths, when compared with the reference composite. Dynamic rheological isothermal measurement of the epoxy resin viscosity further concluded that VAIP had significantly better latency of 580 min at 60 degrees C and 14 days at room temperature, resulting in much longer pot life or shelf life for the formulated resins and their prepreg.

服务人员 尚玮姣

服务院士 宋湛谦

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