The potential of polymer materials for innovative use is almost endless. Steel and aluminum are becoming less common choices because polymers offer cost and weight reductions while maintaining high safety standards. Despite their remarkable qualities, polymers themselves often lack the ability to conduct heat and electricity, limiting their applications in high-tech industries like flexible electronics. As a result, researchers have been striving to enhance the conductivity of polymers by incorporating metallic fillers. In the context of this master's thesis, we examined how different quantities of silica-coated copper (CuSi) particles within a polymer matrix of low-density polyethylene (LDPE) affect the LDPE-Cu composite's optical, rheological, mechanical, thermal, and electrical properties. We compared pure LDPE with LDPE-Cu composites, adjusting the volume fraction of added copper filler from 10 % to 40 %. We came to the conclusion that composites with higher copper content indicated superior mechanical, rheological, thermal, and electrical properties compared to pure LDPE. However, it's essential to consider that an excessive amount of filler may not always be appropriate, as it could lead to overengineering the product for a specific application, potentially increasing unnecessary final expenses.
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