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(Star PS)‐ block ‐(Linear PI)‐ block ‐(Star PS) Triblock Copolymers – Thermoplastic Elastomers with Complex Branched Architectures
Author(s) -
Huang Tianzi,
Knauss Daniel M.
Publication year - 2004
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200451108
Subject(s) - copolymer , polystyrene , polymer chemistry , thermoplastic elastomer , materials science , polymerization , branching (polymer chemistry) , anionic addition polymerization , gel permeation chromatography , isoprene , styrene , polymer , composite material
Polystyrene‐ block ‐polyisoprene‐ block ‐polystyrene triblock copolymers were synthesized with star‐shaped branching in the polystyrene phase. The block copolymers were formed through sequential anionic polymerization by first synthesizing linear polystyrene, followed by star coupling using 4‐(chlorodimethylsilyl)styrene, then the polymerization of isoprene, followed by difunctional coupling with dichlorodimethylsilane. The polymerization was followed by gel permeation chromatography and the resulting copolymers were characterized by 1 H NMR spectroscopy to examine the polyisoprene microstructure.