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Synthesis of well-defined polystyrene with multi-functional end groups utilizing cyclotriphosphazene

✍ Scribed by Kenzo Inoue; Sadao Negayama; Tomoyuki Itaya; Minoru Sugiyama

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 343 KB
Volume: 18
Category: Article
ISSN: 1022-1336
DOI: 10.1002/marc.1997.030180303

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Telechelic polystyrenes with five benzyl chloride moieties at the polymer end (PSt‐E) were prepared by coupling reaction of polystyryllithium with hexakis(4‐chloromethyl‐phenoxy)cyclotriphosphazene (4). The coupling reaction occurs almost quantitatively and unfavorable side reactions were not operative. When a mole ratio [4]/[sec‐BuLi] = 9.3 was used, polystyrenes with cyclophosphazene carrying five benzyl chloride moieties at the polymer end (PSt‐E) were obtained in more than 90% yield, which have narrow and predictable molecular weights (M~w~/M~n~ = 1.05). A star shaped polystyrene with phosphazene core could also be prepared by using excess polystyryl anions.

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