Cadmium sulfide (CdS) nanoparticles were dispersed in a polystyrene (PS) matrix to synthesize semiconducting optical nanocomposites for industrial applications. In this paper, many characteristics of the PS-CdS thick films were studied including thermal conductivity using the transient plane source (TPS) method. Results showed that the thermally conductive CdS nanoparticles enhanced the thermal conductivity of the nanocomposites....