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Chain Walking Ethylene Copolymerization with an ATRP Inimer for One-Pot Synthesis of Hyperbranched Polyethylenes Tethered with ATRP Initiating Sites

✍ Scribed by Kejian Zhang; Jianli Wang; Ramesh Subramanian; Zhibin Ye; Jianmei Lu; Qiang Yu

Book ID
102496414
Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
207 KB
Volume
28
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

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(CH~3~)(NCMe)]SbF~6~ (Ar = 2,6‐(__i__Pr)~2~C~6~H~3~), 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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One-Pot Synthesis of Hyperbranched Polye
One-Pot Synthesis of Hyperbranched Polyethylenes Tethered with Pendant Acryloyl Functionalities by Chain Walking Copolymerizations
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## 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