含磷环氧树脂的合成及阻燃研究

Flame Retardancy Study on Phosphorus-Containing Epoxy Resin Synthesized by the Reaction of DOPO and the Diglycidyl Ether of Bisphenol A

采用阻燃剂9,10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)与双酚A型环氧化物(E-51)反应,合成了含磷反应型阻燃环氧化物(E-P),在间苯二胺固化剂作用下,利用E-P制备了含磷反应型阻燃环氧树脂(EP-P).采用傅里叶红外光谱(FTIR)和热失重分析(TGA)分别对E-P的结构及EP-P的热分解行为进行了表征;通过浸水实验,采用极限氧指数(LOI)和UL-94垂直燃烧等方法对比研究了EP-P与添加聚磷酸铵(APP 422)的添加型阻燃环氧树脂EP-AP的阻燃剂抗迁出性.结果表明,含磷反应型阻燃环氧树脂EP-P比添加型阻燃环氧树脂EP-AP的阻燃效率高、阻燃耐久性更强.

A novel phosphorus-containing epoxy resin was synthesized by the reaction of DOPO （9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide） and the diglycidyl ether of bisphenol A. The thermostability and flame retardancy after water immersion of phosphorus-containing epoxy resin were characterized by thermogravimetry analysis, limiting oxygen index test and UL-94 vertical combustion test. Test results showed that the intrinsically flame-retardant phosphorus-containing epoxy resin had better thermostability and more persistent flame retardancy, when compared with the phosphate-containing cases.