In literature, for similar examples the molecular weights used are significantly lower, ranging from 20 000 g mol -1 to 70 000 g mol -1 with varying P4VP content, usually accompanied by the formation of spheres. So far there are only few cases known, where the introduction of organic or inorganic material into the dBCPs triggered the formation of rods. One example are PB-b-P2VP dBCPs, where the formation of worm-like micelles is observed for a core fraction of 80% and more. This highlights the impact of the size of the P4VP core on the stabilization of spherical nanocomposite particles and the design principles that can be followed.