2003 Fiscal Year Final Research Report Summary
Controlling Morphology of Polymer Blends by Using Spatial and Temporal Modulation
| Project/Area Number |
13031054
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Kyoto Institute of Technology, Department of Polymer Science & Engineering |
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Principal Investigator |
TRAN-CONG-MIYATA Qui Kyoto Institute of Technology, Department of Polymer Science & Engineering, Professor, 繊維学部, 教授 (50188827)
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| Co-Investigator(Kenkyū-buntansha) |
AWATSUJI Yasuhiro Kyoto Institute of Technology, Graduate School of Science & Technology, Div. of Electronics & Information Science, Research Associate, 大学院・工芸科学研究科, 助手 (80293984)
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| Project Period (FY) |
2001 – 2003
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| Keywords | Polymer Blends / Photodimerization / Phase Separation / Cross-linking Reaction / Sharpening of Length Scale Distribution / Interpenetrating Polymer Networks |
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| Research Abstract |
The main purpose of this research project is to manipulate and control the morphology (characteristic, length scales and its distribution) of polystyrene/poly (vinyl methyl ether) (PS/PVME) blends using spatial and temporal modulation. For this purpose, ultraviolet light was used as an external modulating source and the polystyrene component of the blends were made photosensitive by labeling with photo-reactive groups such as anthracene (A) and stilbene (S). The following experiments were performed : (1) Phase separation induced by spatially periodic forcing ; (2) Phase separation induced by temporally periodic forcing ; (3) Phase separation induced by reversible cross-linking reaction ; (4) Phase separation manipulated by competing interactions.
In summary, morphology of a polymer can be well controlled by the characteristic length scales as well as the characteristic time scales of the external modulation. The elastic stress generated by the chemical reactions couples to critical concentration fluctuations, broadening the length scale distribution of the morphology. The competition between stress-induced broadening and reaction-induced sharpening plays the key role in the resulting morphology.
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Research Products
(17 results)
