| 학회 |
한국고분자학회 |
| 학술대회 |
2003년 가을 (10/10 ~ 10/11, 부경대학교) |
| 권호 |
28권 2호, p.226 |
| 발표분야 |
고분자 구조 및 물성 |
| 제목 |
Stability of Square Phase in Blends of Block Copolymer and Homopolymer |
| 초록 |
The ordered structures in blends of AB-block copolymer and A-homopolymer are theoretically examined by Landau-Ginzburg formalism (LG) and numerically simulated by using a combinatorial screening method with self-consistent field theory (SCFT). A particular focus is given on that the stability of cylindrical phase arranged with square symmetry (SQ) that is known as an unstable structure in AB block copolymer melts due to the packing frustration of the majority blocks to fill the corners of the Wigner-Seitz cell of the square lattice. It is found from both LG and SCFT theories that the cylindrical phase in a hexagonal symmetry transforms to a SQ phase on addition of homopolymers to the matrix phase. This remarkable structure-formation is attributed to the relief of packing frustration of the majority blocks by homopolymers that might be, for a large portion of them, located at the corners of the unit cell. |
| 저자 |
허준, 조원호
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| 소속 |
서울대 |
| 키워드 |
block copolymer; Landau-Ginzburg Theory; self-consistent field theory (SCFT); square phase
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| E-Mail |
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