Fecha de publicación: 05/01/2023 Fuente: Wipo Milk or dairy products Disclosed herein are methods for synthesis of ultra-high molecular weight polyethylene (UHMWPE), with improved disentanglement, for solid-state processing into a product, such as tapes, films, and ropes, etc., with superior mechanical properties. The method includes using a catalyst support which includes MgCl2 pre-reacted with different alcohols. The MgCl2/alcohol adducts are reacted with different aluminum alkyls to form nanoparticles support, preferably in-situ, under inert environment in the presence of the monomer used to synthesize the UHMWPE. The resulting heterogeneous catalytic system and polymer synthesis method results in improved UHMWPE with high average molecular weight (Mw) > 1 million g/mol, with lower levels of entanglement (while avoiding fouling seen with homogenous catalytic systems), allowing for processing into products such as tapes with superior mechanical properties.