2022 Fiscal Year Final Research Report
Structure formation and rheology of associating polymers using a coarse-grained flower-micelle model
| Project/Area Number |
19K05615
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 35020:Polymer materials-related
|
|---|
| Research Institution | Kyoto University |
|---|
Principal Investigator |
Koga Tsuyoshi 京都大学, 工学研究科, 教授 (80303866)
|
|---|
| Project Period (FY) |
2019-04-01 – 2023-03-31
|
| Keywords | 会合性高分子 / フラワーミセル / 組み替え網目理論 / レオロジー / ゾル・ゲル転移 |
|---|
| Outline of Final Research Achievements |
The following studies were carried out to elucidate the molecular mechanism of concentration dependence of structure formation and rheological properties exhibited by aqueous solutions of telechelic associative polymers. Based on the "Trainsient Network Theory'' and the interactions between micelles obtained from coarse-grained molecular dynamics simulations of star-shaped polymers, a coarse-grained micelle model was constructed and simulations were performed. Based on the obtained data, we analyzed the percolation transition, linear/nonlinear rheology, packing structure of micelles, and so on. In addition, we performed simulations with varying polymer concentrations to study gelation, micelle phase separation, and crystallization caused by changes in polymer concentration.
|
| Free Research Field |
高分子物性理論
|
| Academic Significance and Societal Importance of the Research Achievements |
本研究では，古くから粘性調節剤や増粘剤として塗料，インク，医薬品，化粧品などの幅広い分野で用いられてきたテレケリック会合性高分子の濃度変化によって引き起こされるゲル化やミセルの充填などの構造変化とレオロジー的性質の間の関係が解明できたので，大きな学術的意義がある．また，会合性高分子を含む製品を塗布した後の乾燥過程での構造変化・物性変化を予測できるようになるので，実際に会合性高分子を使用する状況下での使用感触なども考慮した材料の設計指針の構築が可能になると期待され，産業的意義も大きい．
|
