Analysis of relaxation mechanism of thread-like micelle solution

Satoru Yamamoto, Taku Ozawa, Kosuke Ohata

研究成果: Chapter in Book/Report/Conference proceedingChapter

抄録

Dissipative particle dynamics is applied to study the crossing dynamics at an entanglement point of surfactant thread-like micelles in an aqueous solution. This chapter investigates the possibility of a phantom crossing, which is the relaxation mechanism for the pronounced viscoelastic behavior of a surfactant thread-like micellar solution. When two thread-like micelles are encountered at an entanglement point under a condition close to thermal equilibrium, they fuse to form a four-armed branch point. Then, a phantom crossing reaction occurs occasionally, or one micelle is cut down at the branch point. When increasing the repulsive forces between hydrophilic parts of the surfactants, fusion occurs less and the thread-like micelle is frequently broken down at an entanglement point. In these three schemes (i.e., a phantom crossing, a cut at the branch point, and a break at the entanglement point), the breakage occurs somewhere along the thread-like micelle. The breakage is considered as an essential process in the relaxation mechanism, and a phantom crossing can be seen as a special case of these processes. To explain the experimental evidence that a terminal of thread-like micelles is scarcely observed, a mechanism is also proposed where the generated terminal merges into the connected micelle part between two entanglement points owing to thermal motion.

本文言語英語
ホスト出版物のタイトルComputer Simulation of Polymeric Materials
ホスト出版物のサブタイトルApplications of the OCTA System
出版社Springer Singapore
ページ347-358
ページ数12
ISBN(電子版)9789811008153
ISBN(印刷版)9789811008146
DOI
出版ステータス出版済み - 1 1 2016
外部発表はい

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 工学(全般)
  • 材料科学(全般)

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