Shawn Morgan, Zhibin Ye, Kejian Zhang
Nov 6, 2008
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0
Influential Citations
32
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Journal
Macromolecular Chemistry and Physics
Abstract
Chain walking copolymerization of ethylene with 1,4-butanediol diacrylate at elevated concentrations for the synthesis of low-viscosity hyperbranched polyethylenes tethered with a controllable amount of acryloyl functionality is reported. At concentrations much higher than the critical gelation concentrations, the diacrylate comonomer is copolymerized predominantly following the mono-insertion pattern. A range of hyperbranched polyethylenes tethered with acryloyl functionality (1.3-4.8 mol-%) and having low melt viscosity (ca. 25 Pa ·s at 25°C) and low glass transition temperature (Tg=-69°C) has been synthesized. This unique method is specific to the Pd-diimine-catalyzed chain-walking copolymerization system.