Use of metallocenes in the polymerization‐filling technique with production of polyolefin‐based composites

In an updated version of the polymerization‐filling technique, the surface of particulate fillers has been activated by metallocenes. Homogeneously filled polyolefins have accordingly been produced by the in situ copolymerization of ethylene and α‐olefins, e. g., 1‐octene and 1,9‐decadiene. Different fillers have been successfully used, including inorganic particles with either an acidic surface (kaolin, glass beads, silica) or a basic surface (magnesium hydroxide, wollastonite), graphite and nickel particles. Hydrogen has proved to be efficient in reducing the molecular weight of the produced polymers.