膨胀型防火阻燃涂料的制备及阻燃机理分析

Preparation and Flame Retardant Mechanism Analysis of Intumescent Flame Retardant Coatings

主要采用环氧树脂/聚酯树脂复合树脂作为基体,添加聚磷酸铵(APP)-季戊四醇(PER)-三聚氰胺(Mel)三组分复合阻燃剂,并在阻燃体系中加入协同剂膨胀石墨和填充剂纳米二氧化钛(nTiO_(2)),再加入一定比例的溶剂和助剂,得到了一种新型膨胀阻燃涂料。结果表明:当涂层厚度达到2.0 mm时,其耐火极限可达210 min。应用先进的热分析手段(TGA和DSC)对此阻燃涂料体系中各成分的热特性、分解过程以及各成分间的相互作用关系进行了系统研究。此外,还利用SEM和XRD检测技术研究了其微观形态结构,利用FTIR探究了含磷阻燃剂对燃烧后形成炭化层的贡献情况,从而确定了该阻燃剂在树脂基体中的膨胀阻燃机理。

The title focuses on the development of a new type of intumescent using epoxy resin/polyester resin composite as the matrix material.The flame retardant system consists of ammonium polyphosphate(APP),pentaerythritol(PER),and melamine(Mel).Additionally,synergistic expanded graphite and nano titanium dioxide(nTiO_(2))fillers are incorporated into the flame retardant system.Solvents and additives are also added in specific proportions to achieve desired properties.The results demonstrate that when the coating thickness reaches 2.0 mm,it exhibits a fire resistance rating to 210 minutes.In this study,Advanced thermal analysis techniques such as TGA and DSC were employed to investigate the thermal characteristics and decomposition process of each component in the intumescent system as well as their interactions.Furthermore,SEM and XRD detection technologies were utilized to examine its microstructure,while FTIR was used to explore how phosphorus-containing flame retardants contribute to the formation of carbonization layer after combustion.These analyses help determine the mechanism by which swelling flame retardants function within the resin matrix.