| 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. |