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- Title
Comparative study on synergistic effect of LDH and zirconium phosphate with aluminum trihydroxide on flame retardancy of EVA composites.
- Authors
Kalali, Ehsan; Juan, Sergio; Wang, Xin; Nie, Shibin; Wang, Rui; Wang, De-Yi
- Abstract
Flame-retardant ethylene vinyl acetate (EVA) composite based on aluminum trihydroxide (ATH), layered double hydroxide (LDH) and organo-modified zirconium phosphate (mZrP) were prepared by melt-compounding method. The synergistic effect of LDH and mZrP with ATH on the fire behavior and thermal stability of EVA composites was studied by limiting oxygen index, UL-94 test, cone calorimeter and thermogravimetric analysis. EVA composite with ATH and LDH passed the V-0 rating while EVA composite with ATH and mZrP exhibited relatively low peak heat release rate. EVA/ATH composite with 10 mass% LDH exhibited a char yield of 34 % at 700 °C, while its counterpart with 10 mass% mZrP showed 29 %, indicating LDH possessed superior flame-retardant synergistic efficiency with ATH over mZrP in terms of promoting char formation. Regarding the heat release rate (HRR), EVA/ATH composite with 10 mass% mZrP displayed a 73 % reduction in PHRR, whereas its counterpart with the equivalent loading of LDH showed a lower flame-retardant synergistic efficiency (a 58 % reduction in peak HRR). The results above demonstrated that LDH mainly functioned as catalyst in char formation, while mZrP was beneficial to restraining heat release.
- Subjects
LACTATE dehydrogenase; ZIRCONIUM phosphonates; ALUMINUM hydroxide; METALLIC composites; ETHYLENE; THERMAL stability
- Publication
Journal of Thermal Analysis & Calorimetry, 2015, Vol 121, Issue 2, p619
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-015-4598-9