Premium
Synthesis of heteroarm star‐branched polymers by means of anionic living polymerization
Author(s) -
Hirao Akira,
Matsuo Akira,
Morifuji Kazushi,
Tokuda Yui,
Hayashi Mayumi
Publication year - 2001
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.88
Subject(s) - polystyrene , polymer chemistry , polymer , prepolymer , materials science , anionic addition polymerization , living anionic polymerization , molar mass distribution , polymerization , star polymer , star (game theory) , methacrylate , end group , methyl methacrylate , living polymerization , radical polymerization , composite material , polyurethane , mathematical analysis , mathematics
The synthesis of well‐defined three‐ and five‐arm star polymers, with varying arm lengths, was described by the method based on anionic living polymerization. A three‐arm AB 2 star polymer was synthesized by the linking reaction of a specially designed two chloromethylphenyl‐end‐functionalized polystyrene prepolymer with the anionic living polymer of t ‐butyl methacrylate initiated with diphenylmethylpotassium. A five‐arm AA′ 2 B 2 star polymer was synthesized by the linking reaction of the same functionalized polystyrene having two chloromethylphenyl termini with the block copolymeric anion prepared from the coupling reaction of polystyryllithium with 1,1‐diphenylethylene‐end‐functionalized poly(α‐methylstyrene). Both star polymers were obtained in more than 95% yields and were found to possess well‐defined structures in terms of molecular weight, molecular weight distribution, arm number, and composition. Copyright © 2001 John Wiley & Sons, Ltd.