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Catalytic copolymerization with functional group tolerant lipophilic Ni(II) catalysts in aqueous emulsion-type polymerization or dispersion polymerization in organic solvents (THF, n-heptane) yields ultra high molecular weight polyethylene (UHMWPE) as submicron- or micron-sized, respectively, particles. Precise multiblock copolymers with crystallizable C46 polyethylene blocks and amorphous soluble polybutene blocks, as well as a random ethylene-octene copolymer with similar block lengths were suitable for particle stabilization in the organic dispersion polymerizations.

Graphical abstract: Compartmentalized polymerization in aqueous and organic media to low-entangled ultra high molecular weight polyethylene

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