D. D. Yang, Y. Hu, H. T. Li, L. Song, H. P. Xu and B. Li (2015) Synergistic flame retardant effect of alpha-zirconium phosphate in low-density polyethylene/ethylene-vinyl acetate/aluminum hydroxide hybrids. Journal/Journal Of Thermal Analysis And Calorimetry 119 619-624. [In English]
Web link: http://dx.doi.org/10.1007/s10973-014-4175-7
Keywords: alpha-Zirconium phosphate; Aluminum hydroxide; Synergistic; Flame; retardant; Heat release rate; THERMAL-STABILITY; ION-EXCHANGE; NANOCOMPOSITES; LDPE; POLYMERIZATION; COMPOSITES; BLENDS
Abstract: Organophilic alpha-zirconium phosphate (alpha-ZrP, OZrP) with a lamellar structure is used as a synergistic agent with aluminum hydroxide (ATH) to improve the flame retardancy of low-density polyethylene and ethylene-vinyl acetate (LDPE/EVA) hybrid. The structures of LDPE/EVA/(ATH, OZrP) hybrids are characterized by X-ray diffraction, transmission electron microscopy, and high resolution transmission electronic microscopy. The results indicate that the intercalated and exfoliated nanocomposites are formed. The flammability characterization and synergistic effects of LDPE/EVA/(ATH, OZrP) hybrids have been investigated by cone calorimeter test, limiting oxygen index, and UL-94 tests. The analyses show that hybrids with a given amount of OZrP have apparently reduced the heat release rates and can pass the V-0 rating in the UL-94 test. Based on these findings, a possible and reasonable synergistic flame retardant mechanism of OZrP and ATH is given in the discussion.