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Synthesis of hyperbranched polymers via proton‐transfer polymerization of acrylate monomer containing two hydroxy groups
Author(s) -
Kadokawa Junichi,
Kaneko Yoshiro,
Yamada Shigeo,
Ikuma Kyosuke,
Tagaya Hideyuki,
Chiba Koji
Publication year - 2000
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(20000401)21:7<362::aid-marc362>3.0.co;2-f
Subject(s) - polymerization , polymer chemistry , monomer , chain transfer , acrylate , polymer , branching (polymer chemistry) , materials science , bulk polymerization , chain growth polymerization , radical polymerization , methyl acrylate , chemistry , organic chemistry
The hyperbranched polymer 2 was produced via triphenylphosphine initiated polymerization of the acrylate monomer 1 containing two hydroxy groups. The reaction resulting in 2 is based on a Michael‐type addition followed by a proton‐transfer process. The molecular weights evaluated by VPO measurements were vanging between 1 170–2 700 g/mol. The results of the methanolysis experiments of the polymers were used to determine the degrees of branching, that ranged between 0.45 and 0.60. In this polymerization, the hydroxy groups of the monomer and of the polymer are latent propagating species, which are converted into the corresponding anions, which are the actual propagating species active during the proton‐transfer reactions. The proton‐transfer occur frequently during this polymerization in order to afford the formation of hyperbranched polymers.