Tailoring the Localization of Carbon Nanotubes and Ammonium Polyphosphate in Linear Low-Density Polyethylene/Nylon-6 Blends for Optimizing Their Flame Retardancy

Figure 1

Four processing methods for controlling APP and CNT distribution in LLDPE/PA6 blends. Method 1: all the components were melt-blended at 230°C. The processing temperature was higher than the melt temperature of LLDPE and PA6. Method 2: the blends were prepared through two steps. LLDPE/PA6 blend was prepared at 230°C firstly, and then LLDPE/PA6 blend was blended with APP and CNTs at 160°C. In the second step, the processing temperature was lower than the melt temperature of PA6. Method 3: the blends were prepared through two steps. LLDPE/PA6/CNT blend was prepared at 230°C firstly, and then LLDPE/PA6/CNT blend was blended with APP at 160°C. In the second step, the processing temperature was lower than the melt temperature of PA6. Method 4: the blends were prepared through two steps. LLDPE/PA6/APP blend was prepared at 230°C firstly, and then LLDPE/PA6/APP blend was blended with CNTs at 160°C. In the second step, the processing temperature was lower than the melt temperature of PA6.