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Novel synthesis and solution properties of hyperbranched poly(ethyl methacrylate)s by quasi‐living radical copolymerization using photofunctional inimer
Author(s) -
Ishizu Koji,
Shibuya Takeshi,
Park Jaebum,
Uchida Satoshi
Publication year - 2004
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.1361
Subject(s) - comonomer , copolymer , methacrylate , monomer , polymer chemistry , branching (polymer chemistry) , radical polymerization , methyl methacrylate , reactivity (psychology) , polymerization , materials science , chemistry , organic chemistry , polymer , medicine , alternative medicine , pathology
Hyperbranched poly(ethyl methacrylate)s (PEMA) were prepared by quasi‐living radical copolymerization of 2 ‐( N , N ‐diethylaminodithiocarbamoyl)‐ethyl methacrylate (inimer: DTEM) with ethyl methacrylate (EMA) under UV irradiation. DTEM monomers play an important role in this copolymerization system as inimers capable of initiating living radical polymerization of the vinyl group. Two monomers (DTEM and EMA) showed almost equal reactivity toward both propagating species, and the copolymer composition was the same as the comonomer feed. This result means that both the branching and chain length of the hyperbranched molecules can be controlled statistically by the feed monomer ratios. The compact nature of the hyperbranched macromolecules is demonstrated by comparison of their solution properties with the linear analogues. Copyright © 2004 Society of Chemical Industry