Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 114, Issue 1, Pages 253-259Publisher
SPRINGER
DOI: 10.1007/s10973-012-2867-4
Keywords
Epoxy resin; Flame retardant; Phosphoric acid
Funding
- National Basic Research Program of China (973 Program) [2012CB724609]
- National Natural Science Foundation of China [51206084]
- Out-standing Young Scientist Research Award Fund from Shandong Province [BS2011CL018]
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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 P-31 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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