UV界面聚合法制备含磷环氧微胶囊及其性能研究  

Preparation and Performance Investigation of Phosphorus-Containing Epoxy Microcapsules Synthesized by UV Initiated Radical Copolymerization

作　　者：肖定书[1] 郑成[2] 李险峰[1] 彭忠利[1] 刘鸿[1] 

机构地区：[1]惠州学院化学工程系,广东惠州516007 [2]广州大学,广东广州510006

出　　处：《广州化学》2016年第6期6-11,49,共7页Guangzhou Chemistry

基　　金：广东省教育厅创新项目(2012CXZD0029);惠州市科技计划项目(2014C050012003);惠州学院博士启动基金项目资助

摘　　要：通过双酚A环氧与DOPO反应,合成含磷环氧树脂,并以此为囊芯,环氧丙烯酸酯和可聚合乳化剂共聚物为囊壁,通过UV界面自由基聚合制备兼具阻燃性和自修复性能的含磷环氧微胶囊,并对产物微胶囊的性质进行了进一步研究。用红外光谱(FT-IR)和扫描电镜(SEM)表征了含磷环氧微胶囊的核―壳化学结构和表面形态。采用差热扫描(DSC)分析了囊芯环氧树脂与固化剂的反应活性。通过热重分析法(TG)和极限氧指数法(LOI)研究了含磷环氧微胶囊的热稳定性及其在环氧复合材料中的阻燃性。结果表明:通过UV界面自由基聚合,在相分离作用下,能方便地实现微胶囊化,且所制含磷环氧微胶囊囊芯具明显的反应活性,其热稳定性和阻燃性能满足自修复复合材料性能要求。A phosphorus-containing epoxy（PEP） was synthesized between bisphenol A epoxy resin E-51 and DOPO. A new kind of microcapsules, bearing PEP as the core, epoxy acrylate and polymerizable emulsifier copolymer as the wall, were prepared via UV-initiated radical copolymerization in emulsion. Its structure and properties were further fully studied. The core-shell chemical structure and surface morphology of the phosphorus-containing epoxy microcapsules was characterized by the combination of Fourier transform infrared spectroscopy （FT-IR） and scanning electron microscope （SEM）. The reactive activity between epoxy resin core and curing agent was analyzed by DSC. Its thermal stability and fire retardancy in epoxy composite was tested by thermal gravimetric analysis （TGA） and limiting oxygen index （LOI）. The results demonstrated that PEP-containing microcapsules can be produced via UV initiated radical copolymerization basing on phase separation. Its PEP core displayed obvious reactive activity with curing. Moreover, the thermal stability and ftre retardancy of the resultant microcapsules can meet the needs of self-healing composite materials.

关 键 词：含磷环氧 微胶囊 修复 阻燃 UV界面聚合 

分 类 号：O633.13[理学—高分子化学]