氟硅改性聚氨酯弹性树脂在舰载机雷达罩上的应用研究

Study on the Application of Fluorosilicone Modified Polyurethane Elastic Resin on Shipboard Aircraft Radome

为满足舰载机雷达罩对聚氨酯弹性涂层体系的耐性及介电性能的要求,通过在树脂合成中加入羟基全氟聚醚引入C—F键,在固化剂的合成中加入羟基硅油引入Si—O键,制备了氟硅改性聚氨酯体系。测试了氟、硅改性对聚氨酯弹性涂层性能的影响,并采用傅立叶变换红外光谱仪(FT-IR)、差示扫描量热仪(DSC)、热重分析仪(TGA)对涂层体系的结构与性能进行了分析与表征。结果表明:该体系涂层电性能、各项耐性以及涂层的稳定性超过了未改性的涂层体系,达到了舰载机雷达罩外表面保护涂层的技术要求。红外及热性能表征进一步说明了氟硅改性聚氨酯体系的建立以及该体系对于涂层有效防护的意义。

In order to meet the requirements of shipboard aircraft radome on the outdoor durability and dielectric properties of polyurethane elastic coating system,a fluorosilicone modified polyurethane system was prepared by adding hydroxy perfluoropolyether to introduce C-F bond in the resin synthesis process,and adding hydroxy silicone oil to introduce Si-O bond in the curing agent synthesis process.Effect of fluorine and silicon modification on the properties of polyurethane elastic coating was studied,and the structure and properties of the coating system were analyzed and characterized by FT-IR,DSC,TGA.The results showed that the coating system not only met the previous mechanical performance requirements,but also provided better electrical performance and coating stability than the unmodified coating system,which can meet the technical requirements for the protective coating of shipboard aircraft radome.The performance characterized by FT-IR and TGA further proved the establishment of fluorosilicone modified polyurethane system and illustrated the significance of the system for the effective protection coating.