THE INFLUENCE OF NANO-Al2O3 ON THE PROPERTIES OF PHOSPHORUS-CONTAININGFLAME RETARDED EPOXY RESINS

Abstract

Abstract: In this work, nano-Al₂O₃ was used as the synergistic flame retardant to study its influence on the flame retardancy of the EP/DOPO and EP/HPCTP thermosets. The thermal stability and flame retardancy of the neat EP and flame retarded EP thermosets were studied by thermogravimetric analysis (TGA), dynamic thermomechanical analysis (DMA), limiting oxygen index (LOI) and UL-94 vertical burning test. The results indicated that the phosphorus-containing flame retardant (DOPO or HPCTP) contributed to improving the flame retardancy of the cured EP resins. However, it will result in the decrease of the T_g of the cured EP resins. Nevertheless, Nano-Al₂O₃ not only increased the char yield at 800 ℃ and LOI of the cured EP resins, but also improved the T_g and onset decomposition temperature of the cured EP resins to some extent. When the content of nano-Al₂O₃ was 4% in the cured EP resins, the LOI of EP-DOPO-Al₂O₃-4phr and EP-HPCTP-Al₂O₃-4phr achieved 36.4% and 41.0%, and UL-94 V-0 rating was obtained, which indicated that nano-Al₂O₃ was an effective synergistic flame retardant to improve the flame retardancy of the EP/DOPO and EP/HPCTP thermosets.

Key words: epoxy resin, flame retardancy, phosphorus-containing flame retardant, Nano-Al₂O₃

CLC Number:

TB332

LI Dao-cheng, WANG Jun, HUO Si-qi, ZHANG Bin. THE INFLUENCE OF NANO-Al₂O₃ ON THE PROPERTIES OF PHOSPHORUS-CONTAININGFLAME RETARDED EPOXY RESINS[J]. Fiber Reinforced Plastics/Composites, 2017, 0(10): 41-45.

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THE INFLUENCE OF NANO-Al₂O₃ ON THE PROPERTIES OF PHOSPHORUS-CONTAININGFLAME RETARDED EPOXY RESINS

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