三聚氰胺氰尿酸盐（MCA）/尼龙6阻燃复合材料具有良好的无卤阻燃特性。但该材料研究中尚存在MCA传统合成以大量水为反应介质造成水资源浪费和废水排放、增强尼龙6体系中MCA阻燃性能由于“烛芯效应”而大幅度降低、复合材料阻燃机理研究有待进一步深入等问题。本项目在熔融己内酰胺中合成MCA，并引入SiO2溶胶对其粒径与性能进行优化调控，继而原位合成改性MCA/尼龙6阻燃复合材料。通过研究材料的结构与性能，得出改性MCA及阻燃尼龙6复合材料制备的最佳参数及相关机制、阻燃尼龙6的阻燃机理，有望在无卤阻燃尼龙6制备关键技术取得突破，制备性能优异的阻燃尼龙6复合材料，且制备工艺可实现资源节约和环境友好，同时可探析材料体系中复合组分相互作用机制，为进一步优化制备技术打下理论基础。

Melamine cyanurate (MCA)/nylon 6 flame retardant composite poccesses excellent non-halogen flame retardant characteristics, yet, as MCA is commonly synthesized using water as the reaction media, large amount of wastewater might be discharged, meanwhile, the flame retardant properties of MCA decrease because of the wick effect in reinforced nylon 6 composites, and the investigation on flame retardant mechanism of this flame retardant and its composites is not so systematic. To solve these problems, molten ε-caprolactam is used as the media for the preparation and modification processes of MCA, and silica sol is introduced as a modifier to capsule MCA while controlling its diameter and optimizing its surface properties, and then, modified MCA/nylon 6 composites are prepared by in-situ polymerization. Based on the study on the structure and properties of modified MCA and flame retardant nylon 6 composites, the effect of processing parameters can be examined, while, the synthesis and modification of MCA, polymerization mechanism of nylon 6 at the presence of modified MCA, and flame retardant mechanism will be investigated. Through this research, key technical breakthroughs can be made in the synthesis of non-halogen flame retardant nylon 6 composites, excellent flame retardant nylon 6 composites can be prepared using an environment-friendly method, and the interaction of different components in the matrix can be clarified, which is helpful for further optimization of synthesizing technology.