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ID 115340
著者
Morikami, Akihiro The University of Tokushima
Fujioka, Yasuhiro The University of Tokushima
キーワード
Hydrogen bonding
N-Isopropylacrylamide
Stereospecific radical polymerization
資料タイプ
学術雑誌論文
抄録
Radical polymerization of N-isopropylacrylamide (NIPAAm) was investigated at low temperatures in the presence of both hexamethylphosphoramide (HMPA) and alkyl alcohols. Although HMPA and alkyl alcohols separately induced syndiotactic specificity in NIPAAm polymerization in toluene at low temperatures, a combination of HMPA and less bulky alkyl alcohols, such as methanol and ethanol, was found to induce isotactic specificity at –80°C. NMR analysis of mixtures of NIPAAm, ethanol and HMPA suggested the formation of a 1:1:1 complex through O–H•••O=C and N–H•••O=P hydrogen bonding. It is believed that the steric effect of HMPA enhanced by cooperative hydrogen bonding was responsible for the combined effect of HMPA and alkyl alcohols in inducing isotactic specificity.
掲載誌名
Polymer
ISSN
00323861
cat書誌ID
AA11537383
出版者
Elsevier
52
3
開始ページ
629
終了ページ
634
発行日
2010-12-22
権利情報
© 2010. 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
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
著者版
部局
理工学系