| Project/Area Number |
11450365
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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 |
高分子構造・物性(含繊維)
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
SHIOMI Tomoo Nagaoka University of Technology, Department of Chemistry, Professor, 工学部, 教授 (10134967)
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| Co-Investigator(Kenkyū-buntansha) |
TAKESHITA Hiroki Nagaoka University of Technology, Department of Chemistry, Associate, 工学部, 助手 (80313568)
TAKENAKA Katsuhiko Nagaoka University of Technology, Department of Chemistry, Associate Professor, 工学部, 助教授 (30188205)
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| Project Period (FY) |
1999 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥14,300,000 (Direct Cost: ¥14,300,000)
Fiscal Year 2001: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2000: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1999: ¥9,200,000 (Direct Cost: ¥9,200,000)
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| Keywords | crystallization / microphase separation / higher-order structure / block copolymer / graft copolymer / spherulite / time-resolved small-angle X-ray scattering / ポリエチレングリコール / ポリ(ε-カプロラクトン) / ポリメチルメタクリレート / ミクロ相分離構造 / 結晶-非晶構造周期 / ポリブタジエン / ポリエチレン / ポリスチレン / 結晶-非晶繰り返し構造 |
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| Research Abstract |
(1)Formation of higher-order structure on crystallization from microphase-separated melts was studied for both block copolymers having rubbery and glassy amorphous components, respectively. For the former block copolymers the structure was reorganized on crystallization from lamellar melt, while for the block copolymers having a crystalline component in the cylindrical microdomain they crystallized within the microdomain. On the other hand, the latter block copolymers crystallized within the microdomain regardless of their microphase separation structure, lamella or cylinder. In the crystallization of the latter block copolymers a small Avrami exponent and high apparent activation energy of crystallization were observed. (2) In crystalline-crystalline block copolymers where the melting temperatures of both components are close to each other, one component took priority in crystallization, followed by crystallization of the other component, as a result double spherulites like a concentric circle were formed in the ABA triblock copolymer. (3) Both nucleation densities and growth rates depended on the graft density in crystallization of graft copolymers.
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