Chain walking ethylene copolymerization with an ATRP inimer for one-pot synthesis of hyperbranched polyethylenes tethered with ATRP initiating sites
writer：K. Zhang, J. Wang, R. Subramanian, Z. Ye*, J. Lu, Q. Yu
keywords：Atom transfer radical polymerization (ATRP), Chain walking polymerization, Functionalized polyolefins, Hyperbranched, Inimer, Polyethylene
source：期刊
specific source：Macromolecular Rapid Communication
Issue time：2007年
A one-pot procedure for the synthesis of hyperbranched polyethylenes tethered with ATRP initiating sites by chain walking ethylene copolymerization with an acrylate‐type ATRP inimer, 2-(2-bromoisobutyryloxy) ethyl acrylate (BIEA) is reported. Because of its ability to incorporate acrylate-type comonomers and tolerance toward the α‐bromoester group, the chain walking Pd-diimine catalyst, [(ArN?C(Me)?(Me)C?NAr)Pd(CH3)(N?CMe)]SbF6 (Ar?=?2,6‐(iPr)2C6H3), allowed the successful synthesis of a series of hyperbranched copolymers tethered with 2-bromoisobutyryl groups at different densities. These copolymers may serve as polyfunctional macroinitiators for the ATRP of functional monomers to further synthesize core‐shell structured functionalized copolymers with a hyperbranched polyethylene core grafted with side chains of the functional monomers.