Abstract: Epoxy/unsaturated polyester blend (85/15% w/w) with fillers of mica samples were prepared by cast molding method with filler volume fractions (0, 1, 2 and 3%). Hardness, tensile strength, elongation, DSC, FTIR, UV, atomic force were studied. This experimental investigation is aimed at assessing the performance of polymeric material in high temperatures applications. Shore hardness tests were used to measu the hardness. Fourier Transform Infrared spectroscopy (FTIR) to study the bonds which enhanced the mechanical, thermal properties of polyester material compounded with filler. Polymer composites Exhibits a new UV-visible absorption band which is attributed to interchain interaction. hardness enhanced with filler content increase. The experimental results showed that (3% mica) sample has the minimum value of tensle strength, hardness and elongation. The increase with filler content increase therefore, increase. On the other hand (1% mica) sample give the maximum value of tensile strength, hardness and elongation. The glass transition temperature increase by adding mica. The homogeneous morphologies of UP toughened epoxy were studied using atomic force.