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A Novel Crystallization Scheme in Poly[styrene‐ block ‐(ferrocenyl dimethylsilane)] Diblock Copolymers
Author(s) -
Xu Jianjun,
Bellas Vasilios,
Jungnickel Bernd,
Stühn Bernd,
Rehahn Matthias
Publication year - 2010
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000220
Subject(s) - dimethylsilane , crystallization , lamellar structure , copolymer , materials science , polymer chemistry , crystallography , styrene , chemical engineering , chemistry , polymer , composite material , engineering
Isothermal crystallization of the poly(ferrocenyl dimethylsilane) (PFDMS) segments in a poly[styrene‐ block ‐(ferrocenyl dimethylsilane)] (PS‐ b ‐PFDMS) diblock copolymer of lamellar micro‐morphology has been investigated. The PFDMS is shown to crystallize in a confined and grain‐by‐grain fashion. Here a ‘grain’ is defined as an ensemble of stacked lamellae wherein the PFDMS crystallization spreads quickly but stops at its surroundings. Such crystallization propagates not only along the PFDMS lamellae but across the amorphous PS layers as well. We suggest that conformational changes in the PS as induced by the PFDMS crystallization (‘squeezing transfer’) are responsible for the latter pathway of the crystallization's spread.