摘要
无卤反应型多元素协同是环氧树脂阻燃研究的热点,室温合成了上述功能的活性DOPO衍生物DOPO-M和DOPOT。它们作为固化剂,分别与4,4'-二氨基二苯甲烷混合,再与等当量环氧树脂E51固化得到阻燃元素含量可控的环氧体系。使用NMR证明了DOPO衍生物结构,使用红外跟踪其固化过程,继而使用DMTA、TGA和LOI测试分别研究了DOPO衍生物引入量、结构区别对环氧树脂热力学性能、耐热性能及阻燃性能的控制趋势。结果表明:(1)阻燃环氧体系都为均相体系;(2)阻燃环氧体系的耐热性能及阻燃性能均得到显著提升;(3)DOPO-M比DOPO-T在提升阻燃环氧体系的耐热性能及阻燃性能上更有优势。
Halogen-free reactive multi-element synergistic flame-retardant means is the research focus to improve flame retardant properties of epoxy resins. Two kinds of DOPO derivatives that behaves as described above,DOPO-M and DOPO-T,were synthesized by one-step method at room temperature. To control the contents of flame retardant elements of the epoxy system,two DOPO curing agents and one common curing agent 4,4＇-diamino diphenyl methane were mixed respectively,and then cast into molds with stoichiometric E51. NMR spectra proved DOPO derivatives structures correct and the curing processes were tracked by infrared spectra（ FTIR）. The influence of the molecular introduction and structural difference of DOPO derivatives on the dynamic mechanical thermal properties,thermal properties and flame retardancy of the flame retarded epoxy resin were studied. The results showed that：（1）all flame-retardant epoxy systems were homogeneous systems;（2） the thermal and flame retardant properties of all flame retarded epoxy systems were improved remarkably;（3）DOPO-M performed better than DOPOT in improving the thermal and flame retardant properties of the flame retarded epoxy system.
作者
谢聪
周文蓉
张光学
XIE Cong;ZHOU Wen-rong;ZHANG Guang-xue(Hubei Collaboration Innovative Center for Non-Power Nuclear Technology,Hubei University of Science and Technology 1,Xianning 437100,China;Fujian Provincial Key Laboratory of Fire Retardant Materials,College of Materials,Xiamen University2,Xiamen 361005,China)
出处
《科学技术与工程》
北大核心
2018年第16期241-246,共6页
Science Technology and Engineering
基金
湖北省自然科学基金(ZRMS2016001126)
湖北科技学院核技术专项(2018-19KZ06)
湖北科技学院校级项目(2016-XC-010
2017-XB-017)
湖北省教育厅优秀中青年人才科研项目(Q20162806)资助
关键词
反应型阻燃
DOPO衍生物
环氧树脂
固化剂室温合成
reactive type flame retardant
DOPO derivatives epoxy
resins room-temperature synthesis of curing agent
