새로운 형태의 액정고분자

박영욱

Polymer(Korea), Vol.18, No.2, 137-141, March, 1994

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새로운 형태의 액정고분자

New Type of Liquid Crystal Polymer

박영욱

초록

Cyanoazobenzene계 액정화합물을 측쇄로 가진 α-helical polypeptide를 합성했으며 이 고분자는 rigid rod인 α-helix주쇄와 측쇄에 액정화합물이 triple helix형태로 부착된 새로운 형태의 sidechain액정화합물일 것으로 추정된다. 열적 성질을 측정한 결과thermotropic 성질을 가지고 있음이 확인되었으며 X-선회절 조사결과 측쇄가 상당한 규칙적 배열을 하고 있는 것으로 나타났다.

Polypeptide with cyanoazobenzene liquid crystal sidechains was synthesized. This polymer which supposed to have a rigid rod main chain and triple helical liquid crystal sidechains, can form a new type of main-sidechain liquid crystal polymer. Thermal properties showed that this polymer was thermotropic liquid crystal polymer and X-ray diffraction pattern showed that sidechains had high regular arrangement.

[References]

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[1] Voigt-Martin IG, Durst H, Reck B, Ringsdorf H, Macromolecules, 21, 1620 (1988)

[2] Onsager L, Ann. N.Y. Acad. Sci., 51, 627 (1949)

[3] Flory PJ, Proc. R. Soc. London A, 234, 60 (1956)

[4] Watanabe J, Ono H, Uematsu I, Abe A, Macromolecules, 18, 2141 (1985)

[5] Watanabe J, Fukuda Y, Gehani R, Uematsu I, Macromolecules, 17, 1004 (1984)

[6] Livolant F, Levelut AM, Doucet J, Benoit JP, Nature, 339, 724 (1989)

[7] Watanabe J, Takashina Y, Macromolecules, 24, 3423 (1991)

[8] Sisido M, Ishikawa Y, Itoh K, Harada M, Macromolecules, 24, 3999 (1991)

[9] Sisido M, Ishikawa Y, Itoh K, Tazuke S, Macromolecules, 24, 3993 (1991)

[10] Vogel AI, "A Textbook of Practical Organic Chemistry," 3rd ed., Longmans (1973)

[11] Zimmermann H, Poupko R, Luz Z, Billard J, Z. Naturforsch, 40a, 149 (1985)

[12] Poliks MD, Park YW, Samulski ET, Mol. Cryst. Liq. Cryst., 153, 321 (1987)

[13] Park YW, Samulski ET, unpublished results.

[14] Watanabe J, Ono H, Uematsu I, Abe A, Macromolecules, 18, 2141 (1985)

[15] Lefelar JA, Knox JR, Samulski ET, Biopolymer, 22, 1071 (1983)

[16] Block H, "Poly(γ-benzyl-L-glutamate) and Other Glutamic Acid Containing Polymers," Gordon and Breach Sci., Publishers, New York (1983)