2011 Fiscal Year Final Research Report
Nano-cylindrical phase formation in network polymer composites using self-assembly ability of block copolymers
| Project/Area Number |
21360331
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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 |
Composite materials/Physical properties
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| Research Institution | University of Hyogo |
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Principal Investigator |
KISHI Hajime 兵庫県立大学, 大学院・工学研究科, 教授 (60347523)
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| Co-Investigator(Renkei-kenkyūsha) |
MATSUDA Satoshi 兵庫県立大学, 大学院・工学研究科, 准教授 (40316047)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 複合高分子 / 樹脂 / 界面 / ナノコンポジット |
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| Research Abstract |
Phase structures of cured epoxy resins modified with several PMMA-b-PnBA-b-PMMA triblock copolymers(BCP) were studied. The BCPs synthesized by living anionic polymerization were applied as the modifiers for the epoxy resin : diglycidyl ether of bisphenol A(DGEBA). An aromatic amine, an acid anhydride and an anionic polymerization catalyst as curing agents resulted in macro-phase separation of the DGEBA/BCP blends during the cure process. However, a phenol novolac(PN) as the curing agent created nano-phase structures in the DGEBA/BCP blends by activating the self-assembling ability of the BCPs in the epoxy blends. The miscibility of the PMMA block in the BCPs to the PN cured epoxy resin was a key factor to keep the phase structures in nano size. Several nano-phase structures, such as spherical micelles, cylindrical micelles, and curved lamella-like micelles were found in the blends. The size of the nano-phases was 20-40 nm in terms of the diameter or the thickness. The types of the nano-phase structures could be controlled by the resin composition of the blends, the block composition and the molecular weight of the BCPs.
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