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One‐Pot Synthesis of Hyperbranched Polyethylenes Tethered with Pendant Acryloyl Functionalities by Chain Walking Copolymerizations
Author(s) -
Morgan Shawn,
Ye Zhibin,
Zhang Kejian,
Subramanian Ramesh
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800407
Subject(s) - comonomer , copolymer , polymer chemistry , materials science , polymer , composite material
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 ( T g = −69 °C) has been synthesized. This unique method is specific to the Pd‐diimine‐catalyzed chain‐walking copolymerization system.