In:
Macromolecular Symposia, Wiley, Vol. 240, No. 1 ( 2006-07), p. 31-40
Abstract:
In order to achieve the successive synthesis of star‐branched polymers, we have developed a new iterative methodology which involves only three sets of the reactions in each iterative process: (a) a coupling reaction of a living anionic polymer with 1,1‐bis(3‐chloromethylphenyl)ethylene to prepare a DPE‐chain‐functionalized polymer, (b) an addition reaction of sec ‐BuLi to the DPE‐chain‐functionalized polymer, followed by treatment with 1‐(4‐(4‐bromobutyl)phenyl)‐1‐phenylethylene to prepare a new DPE‐chain‐functionalized polymer whose DPE is separated by four methylene units from the main chain, and (c) a coupling reaction of 1,1‐bis(3‐chloromethylphenyl)ethylene with the polymer anion derived from the newly prepared DPE‐chain‐functionalized polymer and sec ‐BuLi. With this methodology, a series of well‐defined 4‐arm, 8‐arm, and 16‐arm regular star‐branched polystyrenes as well as 4‐arm A 2 B 2 , 8‐arm A 4 B 4 , and 16‐arm A 8 B 8 asymmetric star‐branched polymers comprising polystyrene and poly(α‐methylstyrene) segments have been successively synthesized.
Type of Medium:
Online Resource
ISSN:
1022-1360
,
1521-3900
DOI:
10.1002/masy.200650805
Language:
English
Publisher:
Wiley
Publication Date:
2006
detail.hit.zdb_id:
2038549-3
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