抄録
The microscopic structures of aqueous dispersions of hydrophobically modified poly(N-isopropylacrylamides) (HM-PNIPAM) and hydrophobically modified poly(ethylene oxide) (HM-PEO), which carry an octadecyl group at each chain end and have an average molecular weight of 20,000 g/mol, were investigated by small-angle neutron scattering (SANS). When the polymer concentration exceeds the overlap concentration, connectivity through bridging chains takes place, resulting in the formation of a network in which flower micelles act as junctions. The temperature dependence of the micelle structure is significant in the case of the HM-PNIPAM system but not significant in the case of the HM-PEO system, indicating the importance of hydrophobic interactions in the structural stability of flower micelles. Two different parameters relating to the micelle size are defined depending on the polymer concentration. One is the total micelle radius in the dilute regime and the other is the non-overlapping radius of the micelles in the semi-dilute regime. These two parameters exhibit qualitatively different trends with respect to temperature.
| 元の言語 | 英語 |
|---|---|
| ホスト出版物のタイトル | Gels |
| ホスト出版物のサブタイトル | Structures, Properties, and Functions |
| ページ | 77-86 |
| ページ数 | 10 |
| 巻 | 136 |
| DOI | |
| 出版物ステータス | 出版済み - 2009 |
出版物シリーズ
| 名前 | Progress in Colloid and Polymer Science |
|---|---|
| 巻 | 136 |
| ISSN（印刷物） | 0340-255X |
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All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Organic Chemistry
- Polymers and Plastics
- Colloid and Surface Chemistry
- Materials Chemistry
これを引用
Study on self-assembly of telechelic hydrophobically modified poly(N-isopropylacrylamide) in water. / Fujimoto, Taisuke; Yoshimoto, Emi; Masahiko, Annaka.
Gels: Structures, Properties, and Functions. 巻 136 2009. p. 77-86 (Progress in Colloid and Polymer Science; 巻 136).研究成果: 著書/レポートタイプへの貢献 › 章
}
TY - CHAP
T1 - Study on self-assembly of telechelic hydrophobically modified poly(N-isopropylacrylamide) in water
AU - Fujimoto, Taisuke
AU - Yoshimoto, Emi
AU - Masahiko, Annaka
PY - 2009
Y1 - 2009
N2 - The microscopic structures of aqueous dispersions of hydrophobically modified poly(N-isopropylacrylamides) (HM-PNIPAM) and hydrophobically modified poly(ethylene oxide) (HM-PEO), which carry an octadecyl group at each chain end and have an average molecular weight of 20,000 g/mol, were investigated by small-angle neutron scattering (SANS). When the polymer concentration exceeds the overlap concentration, connectivity through bridging chains takes place, resulting in the formation of a network in which flower micelles act as junctions. The temperature dependence of the micelle structure is significant in the case of the HM-PNIPAM system but not significant in the case of the HM-PEO system, indicating the importance of hydrophobic interactions in the structural stability of flower micelles. Two different parameters relating to the micelle size are defined depending on the polymer concentration. One is the total micelle radius in the dilute regime and the other is the non-overlapping radius of the micelles in the semi-dilute regime. These two parameters exhibit qualitatively different trends with respect to temperature.
AB - The microscopic structures of aqueous dispersions of hydrophobically modified poly(N-isopropylacrylamides) (HM-PNIPAM) and hydrophobically modified poly(ethylene oxide) (HM-PEO), which carry an octadecyl group at each chain end and have an average molecular weight of 20,000 g/mol, were investigated by small-angle neutron scattering (SANS). When the polymer concentration exceeds the overlap concentration, connectivity through bridging chains takes place, resulting in the formation of a network in which flower micelles act as junctions. The temperature dependence of the micelle structure is significant in the case of the HM-PNIPAM system but not significant in the case of the HM-PEO system, indicating the importance of hydrophobic interactions in the structural stability of flower micelles. Two different parameters relating to the micelle size are defined depending on the polymer concentration. One is the total micelle radius in the dilute regime and the other is the non-overlapping radius of the micelles in the semi-dilute regime. These two parameters exhibit qualitatively different trends with respect to temperature.
UR - http://www.scopus.com/inward/record.url?scp=77952919870&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77952919870&partnerID=8YFLogxK
U2 - 10.1007/2882_2009_11
DO - 10.1007/2882_2009_11
M3 - Chapter
AN - SCOPUS:77952919870
SN - 9783642008641
VL - 136
T3 - Progress in Colloid and Polymer Science
SP - 77
EP - 86
BT - Gels
ER -