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| Synergistic Effect of Layered Double Hydroxides Containing Rare Earth Element on the Intumescent Flame Retardant Poly (butylene succinate) Composites |
| LIU Yuejun** MAO Long |
| (Key Laboratory of New Materials and Technology for Packaging, Hunan University of Technology, Zhuzhou 412007) |
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Cite this article:
LIU Yuejun** MAO Long. Synergistic Effect of Layered Double Hydroxides Containing Rare Earth Element on the Intumescent Flame Retardant Poly (butylene succinate) Composites. Chinese Journal of Materials Research, 2013, 27(6): 589-596.
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Abstract The layered double hydroxides containing rare earth element (MgAlZnLa-CO3 LDHs) with different proportions of metal ions were prepared successfully by the constant pH coprecipitation method. Ammonium polyphosphate, Melamine, and MgAlZnLa-CO3 LDHs were added in poly (butylene succinate) via melt blending to obtain the novel intumescent flame retardant poly (butylene succinate) (IFR-PBS) composites. The study on the effect of MgAlZnLa-CO3 LDHs on thermal and flame retardant properties of IFR-PBS composites was investigated. It was revealed that IFR-PBS composites can achieve the goal of vertical flammability (UL94) V-0 rate and the limiting oxygen index (LOI) value of 33% when the content of MgAlZnLa-CO3 LDHs was 1% (the total loading of flame retardant was 20%). The LOI of IFR-PBS composites depended not only on the amount of the char, but also on the structure of the char layer. The addition of MgAlZnLa-CO3 LDHs could promote the formation of graphite structures on the outer surface of the char layer to improve its strength and compactness markedly. Cone calorimeter test results also showed that the carbon layer of high density due to combustion can effectively reduce the release of flammable small molecules and soot as a result of the decrease of the heat release rate and smoke production rate.
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| Fund: Supported by the National Natural Science Foundation of China No. 11372108, New Century Excellent Talent of the Ministry of Education of China No.NCET-10-0161, Natural Science Foundation of Hunan Province No. 14JJ5021 and the Open Fund Project Innovation Platform of University in Hunan No.13K098. |
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