Polyethylene diphenylphosphine

PEG)-modified ligands [e.g. polyethylene glycol triphenylphosphine oxide (PETPPO) and methyl polyethylene glycol diphenylphosphine (MDPP)— Pig. 5] was investigated. 

Recently, diphenylphosphine has been shown to be an efficient chain-transfer agent in organolanthanide-catalyzed ethylene polymerization, yielding phosphine-terminated polyethylenes. This reaction is a versatile, efficient way of incorporating an electron-rich functional group into an otherwise inert polymer.929... 

Some years ago, Malmstrom etal. synthesized water-soluble metal phosphine complexes based on water-soluble polymers [41], In order to have solubility in both an acidic and a basic medium, they prepared two different water-soluble polymers. For the first, they made methyl [4-(diphenylphosphino)benzyl]amine (PNH) react with poly(acrylic acid) (PAA) using dicydocarbodiimide (DCC) as the coupling agent, under strict exclusion of oxygen (25). For the second, they reacted (4-carboxy-phenyl)diphenylphosphine with polyethylene imine (PEI) at room temperature (26). The reduction by sodium borohydride was made in situ, followed by the addition of methanesulfonic add and diethyl ether. Then, the methanesulfonic salt of phosphinated polyethylenimine was predpitated. 

Late transition metal complexes, which are more stable in water, can be used for emulsion polymerization [123-125]. Very small and stable polyethylene particles with diameters of 100 mn are obtained by microemulsion polymerization using nickel(II) complexes and diphenylphosphine benzene sulfonate as cocatalyst [126]. 

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