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ID 115349
Author
Kamikubo, Takahiro Tokushima University
Fujioka, Yasuhiro Tokushima University
Keywords
Hydrogen bond
N-Isopropylacrylamide
Syndiotactic-specific radical polymerization
Solvent effect
Content Type
Journal Article
Description
Radical polymerizations of N-isopropylacrylamide (NIPAAm) in several solvents at low temperatures in the absence or presence of hexamethylphosphoramide (HMPA) or 3-methyl-3-pentanol (3Me3PenOH) were examined. The isotacticities of the poly(NIPAAm)s obtained in the absence of HMPA and 3Me3PenOH at lower temperatures slightly increased as the polarities of the solvents used increased. The addition of HMPA significantly induced the syndiotactic-specificity even in polar solvents such as tetrahydrofuran and acetone, although the use of the solvents having proton-donating ability, such as chloroform, prevented the induction of the syndiotactic-specificity, even if their polarities are low. In the presence of 3Me3PenOH, a good correlation between the polarities of the solvents used and the syndiotacticities of the obtained poly(NIPAAm)s was observed, and poly(NIPAAm) with r = 73% was obtained using the toluene/methylcyclohexane mixed solvent.
Journal Title
European Polymer Journal
ISSN
00143057
NCID
AA00639767
AA11527404
Publisher
Elsevier
Volume
44
Issue
4
Start Page
1053
End Page
1059
Published Date
2008-02-09
Rights
© 2008. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
Author
departments
Science and Technology