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Synthesis of a Multi Alternating-Arm-Containing Dendritic Star Copolymer by RAFT and Cationic Ring-Opening Polymerization

✍ Scribed by Ling Zhong; Yongfeng Zhou; Deyue Yan; Caiyuan Pan

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
377 KB
Volume
29
Category
Article
ISSN
1022-1336

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✦ Synopsis

Abstract

A new dendritic heteroarm star copolymer that contains multi‐alternating arms of poly(ethylene oxide‐tetrahydrofuran) (P(EO‐THF)) and poly(methyl methacrylate) (PMMA) on a dendritic polyester core has been synthesized by a ‘core‐first’ approach by combination of sequential cationic ring‐opening polymerization (CROP) and reversible addition–fragmentation transfer (RAFT) polymerization initiated by a dendritic macroinitiator (3) capped with multi‐alternating terminal carboxylic acid groups (used directly to initiate the ROP of THF in the presence of EO as a polymerization promoter to attain P(EO‐THF) arms) and dithiobenzoate groups (used to initiate RAFT polymerization of MMA to attain PMMA arms). The structures of the products were confirmed by NMR spectroscopy, GPC‐MALLS, and DSC measurements.

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