Fire properties of silylated α‐zirconium phosphate composites based on polystyrene

Abstract

* a-zirconium phosphate (ZrP) (prepared by both reflux and hydrothermal methods) is silylated with chlorotrimethylsilane and characterized by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy. Polystyrene/silylated-ZrP composites show higher thermal stability as the ZrP content increases. Cone calorimetry suggests that the reduction of the peak heat release rate of polystyrene (PS)/ZrP composites does not increase as the ZrP loading increases; the aspect ratio of ZrP has little effect in fire performance of PS/ZrP composites.

Fire retardancy of polyurea and silylated α-zirconium phosphate composites with ammonium polyphosphate

“…The preparation of a-ZrP by the reflux method follows the method of Sun et al 5 The silylated ZrP from a-ZrP follows a recent report from this laboratory. 9 The a-ZrP and silylated ZrP are denoted as RZrP and SRZrP, respectively.…”

“…It was hoped that silylated ZrP may offer fire retardancy to PU without compromising the antiblast properties, since only low loading of silylated ZrP is needed. In a previous study, the different aspect ratios of ZrP, which result from the reflux and hydrothermal methods, did not give significant differences in peak heat release rate (PHRR), 9 and only the reflux method is used here. Similar to previous reports from this laboratory, ammonium polyphosphate (APP) is used in combination with silylated ZrP.…”

Synergistic effect on flame retardancy and thermal behavior of polycarbonate filled with α‐zirconium phosphate@gel‐silica

“…But in fact, it is very difficult to achieve 100% purity, narrow particle size distribution, and controlled aspect ratio . To overcome the main drawbacks of MMT, α‐zirconium phosphate Zr(HPO 4 ) 2 ·H 2 O (α‐ZrP), a synthetic layered compound with controlled structure has been proposed and investigated by Clearfield et al . α‐ZrP shows the promising flame retardant performance due to the high amount of acid catalytic sites on its surface.…”

Thermal and flammability performance of polypropylene composites containing melamine and melamine phosphate‐modified α‐type zirconium phosphates

“…Layered compounds such as montmorillonite (MMT) clay and zirconium phosphates (ZrPs) are potential flame retardant additives for polymers . By forming intercalated and/or delaminated nanostructure, these nanoparticles, at minimal addition levels, impart polymer/layered compounds nanocomposites with improved thermal stability, barrier properties, and fire retardancy.…”