Polyphosphazene hybridized perovskite copper hydroxystannate microspheres effectively improve the flame retardant and mechanical properties of Poly(vinyl Chloride) Resin

Abstract

To effectively reduce the fire hazard of flexible polyvinyl chloride (PVC), this study explored the synthesis of perovskite‐type copper hydroxystannate (CuSn(OH)6) microspheres by co‐precipitation method. Then an organic–inorganic hybrid microsphere (CuSn(OH)6@PZS) with core‐shell structure was fabricated by in situ coating with poly(cyclotriphosphazene‐co‐4,4′‐sulfonyldiphenol) (PZS). The results showed that CuSn(OH)6@PZS performs most significantly in reducing the total heat release, while the CuSn(OH)6 alone achieves the best smoke suppression effect. The limiting oxygen index (LOI) value of the PVC composites is improved from 29.0% to a maximum of 35.3%. During combustion, the peak heat release rate (PHRR) and total smoke production (TSP) decrease by a maximum of 50.8% and 44.9%, respectively. Significantly, the presence of the PZS coating also improves the interfacial compatibility with PVC. The mechanical properties were significantly improved and the elongation at break improving by 40.9%.

Plasticized polyvinyl chloride/melamine‐cyanurate modified Mg(OH)2@bentonite nanocomposites; mechanical, thermal, and flame retardant properties

“…7 In other words, the preparation of PVC nanocomposites is an extensively valuable method for improving thermal stability, flame retardancy, and preventing the migration of PVC plasticizers. [8][9][10][11][12][13] Inorganic metal hydroxide fillers like aluminum trihydrate (ATH) and magnesium dihydroxide (MDH) have been known as excellent examples of flame retardant materials. [14][15][16] MDH and ATH have exhibited a high effect in reducing the heat released and cooling the combustion zone, delaying the ignition time, and decreasing the weight loss caused by ignition.…”