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ID 115975
Author
Miki, Hitomi Tokushima University
Seno, Makiko Tokushima University
Keywords
N-Isopropylacrylamide
Hydrogen bond
Stereospecific radical polymerization
radical polymerization
stereospecific polymerization
syndiotactic polymer
NMR
Content Type
Journal Article
Description
Radical polymerization of N-isopropylacrylamide (NIPAAm) in toluene was investigated in the presence of hexamethylphosphoramide (HMPA). We succeeded in directly preparing syndiotactic-rich poly(NIPAAm), the syndiotacticity of which (r = 70%) is the highest among those of radically-prepared poly(NIPAAm)s so far reported, by lowering polymerization temperature to –60°C in the presence of a twofold amount of HMPA. The NMR analysis revealed that the induced syndiotactic-specificity was ascribed to 1:1 complex formation between NIPAAm and HMPA. Furthermore, thermodynamic analysis described that the induced syndiotactic-specificity was enthalpically achieved.
Journal Title
Polymer
ISSN
00323861
NCID
AA11537383
Publisher
Elsevier
Volume
46
Issue
11
Start Page
3693
End Page
3699
Published Date
2005-04-07
Rights
© 2005. 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