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以三聚氯氰、水合肼和氢氧化钠为原料,根据三聚氯氰中各氯原子取代的活性规律,经过低温、室温和回流3个阶段的反应,合成出新化合物1,3,5-三嗪-2,4,6-三肼,产品收率可达94%,通过元素分析、核磁共振光谱和红外光谱确认了其结构。采用粘度及热变形温度测试等对该化合物作为环氧树脂潜伏性固化剂的性能作了研究。结果表明,其与环氧树脂的混合物40℃下贮存180 d后粘度仅增加1倍,150℃下固化需150 min,而200℃下固化仅需20 min,其固化物的热变形温度为286℃,耐热性优异。
Cyanuric chloride, hydrazine hydrate and sodium hydroxide were used as raw materials. According to the activity of each chlorine atom in cyanuric chloride, three compounds were synthesized by the reaction of low temperature, room temperature and reflux. -triazine-2,4,6-trihydrazide. The yield of the product reached 94%. Its structure was confirmed by elemental analysis, nuclear magnetic resonance spectrum and infrared spectrum. The properties of the compound as a latent curing agent for epoxy resin were studied by using viscosity and heat distortion temperature test. The results showed that the viscosity of the mixture with epoxy resin increased by 100% after stored for 180 d at 40 ℃ for 150 min and cured at 200 ℃ for 20 min. The heat distortion temperature of the cured product was 286 ℃, excellent heat resistance.