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Chain walking ethylene copolymerization with an ATRP inimer for one-pot synthesis of hyperbranched polyethylenes tethered with ATRP initiating sites
作者:K. Zhang, J. Wang, R. Subramanian, Z. Ye*, J. Lu, Q. Yu
關(guān)鍵字:Atom transfer radical polymerization (ATRP), Chain walking polymerization, Functionalized polyolefins, Hyperbranched, Inimer, Polyethylene
論文來(lái)源:期刊
具體來(lái)源:Macromolecular Rapid Communication
發(fā)表時(shí)間: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.


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