abstract |
The invention relates to a polymer composition comprising a polymer (a) and a nanoparticle filler (b), wherein the polymer composition comprises a volume percentage (vol.%) of the nanoparticle filler (b), which is Dvol vol.%, and has a center-to-center average distance, in nanometer (nm), in two dimensions (2D) and with a free radius, from one nanoparticle to its nearest nanoparticle neighbour, which is R1st nm, and wherein the polymer composition shows a dependency between said center-to-center average distance to nearest neighbour, R1st, and said volume percentage, Dvol vol.%, which is R1st = E / (Dvol + 0.3) + F, wherein Dvol 1 ≤ Dvol ≤ Dvol 2 , E 1 ≤ E ≤ E 2 , F 1 ≤ F ≤ F 2 , and Dvol 1 is 0.010 and Dvol 2 is 4.4, E 1 is 100 and E 2 is 280, and F 1 is 50 and F 2 is 140; an electrical device, e.g. a power cable; and a process for producing an electrical device. |