Analysis of Material Viscosity Variations: Mix Processing PC1/PC2 Composites

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Jamal Al Sadi, Aysar Hawari


The present study investigates the effect of the mixing and dispersion process of polycarbonate materials (PCs). The composite was prepared with different melt flow indexes of polycarbonate material. The steps of the (%PC1/%PC2) blends were (100%/0%), (30%/70%), and (0%/100%) (Weight percent). The blends were imparted with the mixing materials with pigment and without pigments. The weight percentage of the two-polycarbonate resins for (PC1/PC2) were PC1 content (30wt%-pph) of MFI (25gm/10mins) and PC2 content (70 wt. %-pph) of MFI (6.5gm/10mins). The minute formulation of PC/PC2 blends, temperature effect on viscosity and pigment dispersion were investigated. This work simulated the Carreau model to fit the viscosity curves at 230, 255, 280°C and for the Master curve at reference 255°C . The color of PC composites was measured according to a typical spectrophotometer. Increasing the temperature and weight percentage of PC1 with (higher melt flow index) showed a significant effect in lower viscosity value and decreased color matching values (dE). The formulation and processes showed an excellent effect on controlling the viscosity, and microtomed plastic sections performed characterizing to different thicknesses and temperatures. The optimal number of particles was increased at higher temperatures and thickness. The average pigment size measured approximately 0.1-0.2 µm. Microscope Observation of Morphology observations showed an excellent dispersion colour matching at lower viscosity.

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