2001 Fiscal Year Final Research Report Summary
Studies on Crystallization Behavior and Final Morphology of ABA-type Triblock copolymers
| Project/Area Number |
12650879
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Tokyo Institute of Technology (2001)
Japan Advanced Institute of Science and Technology (2000) |
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Principal Investigator |
NOJIMA Shuichi Tokyo Institute of Technology, Department of Organic and Polymeric Materials, Associate Professor, 大学院・理工学研究科, 助教授 (20156194)
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| Co-Investigator(Kenkyū-buntansha) |
TANIMOTO Satoshi Japan Advanced Institute of Science and Technology, School of Materials Science, Assistant Professor, 材料科学研究科, 助手 (50303350)
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| Project Period (FY) |
2000 – 2001
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| Keywords | AB-type Diblock Copolymer / ABA-type Triblock Copolymer / Microdomain Structure / Crystallization / Morphology Formation / Final Morphology / Small-Angle X-ray Scattering / Synchrotron Radiation |
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| Research Abstract |
The research results can be summarized as follows : (1) effects of molecular characteristics and crystallization conditions on the crystallization behavior and final morphology of AB-type block copolymers, (2) synthesis, purification, and characterization of ABA-type block copolymers, and (3) evaluation of crystallization behavior and final morphology of ABA-type block copolymers.
(1) We synthesized various ε-caprolactone-block-butadiene diblock copolymers (PCL-b-PB) with different molecular weights and compositions, and observed the final morphology as a function of molecular characteristics and crystallization conditions. We could obtain different morphologies by controlling these factors.
(2) PCL-b-PB-b-PCL triblock copolymers were synthesized by a successive anionic polymerization with tetramethylene dilithium as an initiator/ We finally obtained pure PCL-b-PB-b-PCL copolymers after purifying with GPC.
(3) The crystallization behavior and final morphology of PCL-b-PB-b-PCL copolymers were dependent on the conformation of the constituent block copolymers as well as the pre-existing microdomain structure. That is, the crystallization behavior of ABA-type copolymers is more complicated than that of AB-type diblock copolymers.
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