Flame-retardant epoxy resin based on aluminum monomethylphosphinate |
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| Authors: | Quan Hu Panrui Peng Sha Peng Jiyan Liu Xueqing Liu Liyong Zou Jia Chen |
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| Institution: | 1.Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,Jianghan University,Wuhan,China;2.Flexible Display Materials and Technology Co-innovation Center of Hubei Province,Jianghan University,Wuhan,China |
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| Abstract: | Aluminum monomethylphosphinate (MeP-Al) was synthesized and applied as a flame retardant for epoxy resin (EP). The structure of MeP-Al was characterized with FTIR, 1H NMR, 31P NMR and XRF. Curing reaction monitoring, thermal analysis, evolved gas and solid residue analysis, flammability tests (LOI, UL 94), microcombustion calorimeter and chemical analysis of residues were used. 20 mass% of MeP-Al provides EP with desired flame retardancy and anti-dripping property. The formulation passes the UL 94 V0 rating with LOI value of 29.6 %. MeP-Al mainly acts in the solid phase, and minority acts in the gas phase. P–H bond in MeP-Al can react with the unsaturated bond of compounds coming from decomposition of EP to form the condensed and stable phosphate salts in the solid phase. The firm char is a good barrier to avoid heat transfer and progressive degrading of the inner material. |
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