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A Helical Poly(macromonomer) Consisting of a Polyacetylene Main Chain and Polystyrene Side Chains
Author(s) -
Zhang Wei,
Shiotsuki Masashi,
Masuda Toshio
Publication year - 2007
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200700051
Subject(s) - polyacetylene , macromonomer , polystyrene , acetylene , polymer chemistry , side chain , polymerization , styrene , materials science , copolymer , chemistry , polymer , organic chemistry , composite material
A novel helical poly(macromonomer) [poly(M‐PS): absolute $\overline M _{\rm w} $ = 82 800–252 000, determined by GPC/RALLS] with a polyacetylene main chain and polystyrene (PS) side chains was synthesized by the polymerization of acetylene‐terminated M‐PS [ $\overline M _{\rm n} $ = 2 000, $\overline M _{\rm w} $ / $\overline M _{\rm n} $ = 1.20, $\overline {DP} _{\rm n} $ = 18] with an Rh catalyst. M‐PS was prepared by ATRP of styrene using the acetylene‐containing initiator 2‐bromo‐2‐methylpropionic acid ( S )‐1‐methylpropargyl ester ( l ). In solutions, poly(M‐PS) exhibited an intense CD signal at 345–355 nm, indicating that it possessed a predominantly one‐handed helical conformation. Poly(M‐PS) had a stable helical conformation irrespective of solvents and temperature.