Microscopic implication of rapid shrinking of comb-type grafted poly(N-isopropylacrylamide) hydrogels

Toyoaki Matsuura, Masaaki Sugiyama, Masahiko Annaka, Yoshiaki Hara, Teruo Okano

研究成果: ジャーナルへの寄稿記事

22 引用 (Scopus)

抄録

The shrinking mechanism of comb-type grafted poly(N-isopropylacrylamide) gel was investigated by small-angle X-ray scattering (SAXS). The SAXS reveals that the microdomain structure with characteristic spacing of 460 Å is developed in the comb-type grafted poly(N-isopropylacrylamide) gel during the shrinking process. These observations suggest that the freely mobile characteristics of the grafted chains are expected to show the rapid dehydration to make tightly packed globules with temperature, followed by the subsequent hydrophobic intermolecular aggregation of the dehydrated graft chains. The dehydrated grafted chains created the hydrophobic cores, which enhance the hydrophobic aggregation of the networks. These aggregations of the NIPA chains contribute to an increase in void volume, which allow the gel having a pathway of water molecules by the phase separation.

元の言語英語
ページ(範囲)4405-4409
ページ数5
ジャーナルpolymer
44
発行部数16
DOI
出版物ステータス出版済み - 7 10 2003

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Hydrogels
Agglomeration
Gels
X ray scattering
Dehydration
Grafts
Phase separation
Molecules
Water
poly-N-isopropylacrylamide
Temperature

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

これを引用

Microscopic implication of rapid shrinking of comb-type grafted poly(N-isopropylacrylamide) hydrogels. / Matsuura, Toyoaki; Sugiyama, Masaaki; Annaka, Masahiko; Hara, Yoshiaki; Okano, Teruo.

:: polymer, 巻 44, 番号 16, 10.07.2003, p. 4405-4409.

研究成果: ジャーナルへの寄稿記事

Matsuura, Toyoaki ; Sugiyama, Masaaki ; Annaka, Masahiko ; Hara, Yoshiaki ; Okano, Teruo. / Microscopic implication of rapid shrinking of comb-type grafted poly(N-isopropylacrylamide) hydrogels. :: polymer. 2003 ; 巻 44, 番号 16. pp. 4405-4409.
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abstract = "The shrinking mechanism of comb-type grafted poly(N-isopropylacrylamide) gel was investigated by small-angle X-ray scattering (SAXS). The SAXS reveals that the microdomain structure with characteristic spacing of 460 {\AA} is developed in the comb-type grafted poly(N-isopropylacrylamide) gel during the shrinking process. These observations suggest that the freely mobile characteristics of the grafted chains are expected to show the rapid dehydration to make tightly packed globules with temperature, followed by the subsequent hydrophobic intermolecular aggregation of the dehydrated graft chains. The dehydrated grafted chains created the hydrophobic cores, which enhance the hydrophobic aggregation of the networks. These aggregations of the NIPA chains contribute to an increase in void volume, which allow the gel having a pathway of water molecules by the phase separation.",
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