Preparation and Flammability of PVC/CuAl-LDH Nanocomposites Synthesized by Melt Blending

The melt blending reaction of PVC with CuAl-nitrate [Cu Al NO3] layered double hydroxide (CuAl-LDH) modified with Sodium dodecylbenzene sulfate (CuAl-LDH-SDBS) was investigated by using X-ray diffraction, and transmission electron microscopy (TEM). These results showed that exfoliated PVC/CuAl-LDH-SDBS nanocomposites were successfully prepared. Thernnogravimetric analysis (TGA) results showed that PVC/CuAl-LDHSDBS nanocomposites have a higher thermal stability in the temperature range from 200 degrees C to 500 degrees C than the sample PVC. LOI values and ESEM morphologies of PVC and PVC nanocomposites char residues show that CuAl-layered double hydroxide improve the flame retardant properties of PVC/CuAl-LDH-SDBS nanocomposites significantly through forming a tight protective barrier to prevent acutely combustion. This kind of nanocomposite is promising for use in flame-retardant polymeric materials.