Stable Ultrahighly Branched Polyethylene Synthesis via Externally Robust Chain-Walking Polymerization

Chain walking polymerization (CWP) with Pd‐diimine catalysis represents a novel concept for the synthesis of hyperbranched polyethylenes (HBPEs) and functionalized polymers from ethylene stocks. This article summarizes recent developments in this research area. The properties of HBPEs have recently been studied and their application as lubricant viscosity additives, polymer processing aids, and polymers for the functionalization and solubilization of carbon nanotubes in organic solvents have been explored, with some outstanding features having been discovered. Using the CWP strategy, we have also synthesized a range of functionalized HBPEs covalently tethered with a variety of functional groups, including POSS nanoparticles, ATRP‐initiating sites, methacryloyl and acryloyl double bonds, and backbone‐incorporated functionalized ring units.magnified image

Synthesis and characterization of hyperbranched polyethylenes containing cross-linking structures by chain walking copolymerization of ethylene with diacrylate comonomer

Synthesis of hyperbranched polyethylene and carboxylate functionalized polyethylene using bis(benzocyclopentyl) α-diimine Pd(II) catalysts with axial substituent-constrained strategy