2011 Fiscal Year Final Research Report
Effects of thermodynamic and spatial constraints on dynamics of block copolymers
| Project/Area Number |
21350063
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Polymer chemistry
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
MASUBUCHI Yuichi 京都大学, 化学研究所, 准教授 (40291281)
MATSUMIYA Yumi 京都大学, 化学研究所, 助教 (00378853)
UNEYAMA Takashi 京都大学, 化学研究所, 助教 (10524720)
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| Project Period (FY) |
2009 – 2011
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| Keywords | ブロック共重合体 / ダイナミクス / 熱力学的拘束 / 空間的拘束 |
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| Research Abstract |
Dielectric relaxation was examined for microdomain-forming block copolymer systems composed of polystyrene(S) and polyisoprene(I), the latter having the type-A dipoles parallel along the chain backbone. The slow relaxation behavior detected end-to-end fluctuation of the I chains. The behavior of guest homo-PI chains mixed in I domains of the SIS triblock copolymer indicated that the chain dynamics is governed by the osmotic constraint(allowing no density fluctuation) to become self-similar. The behavior of dipole-inverted SIIS triblock and its precursor SI diblock copolymers suggested that the I block of SIS in spherical/cylindrical I domains exhibits either loop-type of pseudo-bridge-type dynamics according to its end-to-end distance.
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