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Synthesis and characterization of four‐arm star‐shaped polymers and copolymers
Author(s) -
Wang TzongLiu,
Tseng ChingGuey
Publication year - 2006
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.2008
Subject(s) - copolymer , polymer chemistry , polymer , atom transfer radical polymerization , gel permeation chromatography , polystyrene , differential scanning calorimetry , materials science , thermogravimetric analysis , star polymer , methyl methacrylate , radical polymerization , chemical engineering , chemistry , composite material , organic chemistry , physics , thermodynamics , engineering
Four‐arm star‐shaped polymers and copolymers were obtained by transition metal‐catalyzed atom‐transfer radical polymerization (ATRP). The polymers were characterized by FTIR and 1 H‐NMR spectroscopy. Gel permeation chromatography results indicated the formation of polystyrene and polystyrene‐ block ‐poly(methyl methacrylate) (PS‐ b ‐PMMA) arms with controlled molecular weights. In dilute solution, the linear polymers had higher inherent viscosities than star‐shaped ones. Thermogravimetric analysis showed a similar degradation mechanism for linear and star‐shaped polymers. Differential scanning calorimetry indicated the successful formation of diblock star‐shaped copolymers. Copyright © 2006 Society of Chemical Industry