An investigation was carried out on the effects of red mud ratio and UV annealing treatment on the
mechanical, thermal and morphological properties of high-density polyethylene (HDPE)/red mud
(RM) polymer composites. Red mud, in six different concentrations (0, 10, 20, 30, 40, and 50 wt %),
was added to HDPE to produce composites. The annealing UV treatment was carried out at 100°C for
three different holding times: 100, 200 and 300 h. The mechanical properties, including the elastic
modulus, tensile strengths, strain at tensile strength, Izod impact resistance, hardness, and melt flow
index with and without an annealing UV treatment, and the thermal properties, such as the Vicat
softening point, heat deflection temperature and melt-flow index, of the composites were investigated.