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Synthesis of multi‐arm star polystyrene with hyperbranched polyester initiators by atom transfer radical polymerization
Author(s) -
Jiang Guohua,
Wang Li,
Chen Tao,
Chen Chang,
Yu Haojie
Publication year - 2005
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.22191
Subject(s) - atom transfer radical polymerization , polymer chemistry , polystyrene , differential scanning calorimetry , thermogravimetric analysis , dispersity , materials science , polymer , polyester , radical polymerization , monomer , glass transition , copolymer , polymerization , chemical engineering , chemistry , organic chemistry , composite material , physics , engineering , thermodynamics
Multi‐arm star polystyrenes with hyperbranched polyester (HP3) core were prepared by atom transfer radical polymerization (ATRP). The structures of the polymers were investigated with FTIR and 1 H NMR. GPC results showed that the resultant polymers had relatively broad polydispersity indices that arouse from the macromolecular initiator (HP3‐Br). The thermal properties were studied using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). DSC analysis indicated that polystyrene star polymers had only the glass transition temperatures ( T g ), which changes with the weight ratio of multi‐functional macroinitiator‐to‐monomer. In addition, these star polymers could form the spherical micelles in the selected solvent (THF/ n ‐hexane). © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 728–733, 2006