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Self‐Seeding in One Dimension: An Approach To Control the Length of Fiberlike Polyisoprene–Polyferrocenylsilane Block Copolymer Micelles
Author(s) -
Qian Jieshu,
Guerin Gerald,
Lu Yijie,
Cambridge Graeme,
Manners Ian,
Winnik Mitchell A.
Publication year - 2011
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201006223
Subject(s) - micelle , crystallinity , copolymer , seeding , materials science , polymer , dissolution , decane , chemical engineering , polymer chemistry , chemical physics , crystallography , chemistry , composite material , thermodynamics , physics , aqueous solution , organic chemistry , engineering
Do it yourself : When short fragments (ca. 50 nm) of rodlike PI‐PFS block copolymer micelles in decane are heated above a characteristic temperature (60 °C) and then cooled to room temperature, a smaller number of longer micelles with a narrow length distribution are obtained. This process resembles self‐seeding of polymer crystals, involving selective dissolution of the fragments of the lowest degree of crystallinity with the surviving submicroscopic seeds acting as nuclei for the growth of micelles upon cooling.