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The optimum synergistic melt blending of 18 antioxidants and light stabilizers has been evaluated using differential scanning calorimetry (DSC) analysis and melting point phase plots obtained to evaluate any effective true eutectic mixtures. Although only three systems gave true eutectic mixtures, optimum lower temperature melt blends were possible up to 230°C. Systems with Lowilite 26 and Cyasorb...