Flame retardant epoxy resin based on bisphenol A epoxy resin modified by phosphoric acid |
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| Authors: | Chuanmei Jiao Jinlong Zhuo Xilei Chen Shaoxiang Li Huajin Wang |
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| Institution: | 1. College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, People’s Republic of China
2. Marine Chemical Research Institute, Qingdao, Shandong, 266071, People’s Republic of China
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| Abstract: | Flame retardant epoxy resin (FREP) were synthesized from phosphoric acid and bisphenol A epoxy resin (BAEP). The structure of the FREP was characterized using FTIR and 31P NMR. Then, several FREP/BAEP mass ratios were used to obtain materials with different phosphorus contents. The properties of the thermosetting materials were evaluated by limiting oxygen index, UL 94, cone calorimeter test, and thermogravimetric analysis. The results showed that the heat release rates and smoke production rates decreased greatly, and char residue increased with the increasing of FREP. It indicates that good flame retardant properties are related to the formation of a protective phosphorus-rich char layer. |
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