Article

Thermotropic Liquid Crystalline Behavior of Poly[1-cholesteryloxycarbonyloxy]ethylene] and Poly[1-(cholesteryloxycarbonylheptanoyloxy)ethylene]
Jeong SY, Ma YD
폴리[1-(콜레스테릴옥시카보닐옥시)에틸렌]과 폴리 [1-(콜레스테릴옥시카보닐헵타노일옥시)에틸렌]의 열방성 액정 거동
정승용, 마영대

Abstract

Poly[1-(cholesteryloxycarbonyloxy)ethylene] (PCOE) and poly[1-(cholesteryloxycarbonylheptanoyloxy)ethylene] (PCOSE) were prepared by reacting poly(vinyl alcohol) with cholesteryl chloroformate or 8-cholesteryloxycarbonylheptanoyl chloride (CH8C), and their thermal and optical properties were investigated. CH8C formed a monotropic cholesteric phase, whereas PCOE and PCOSE exihibited enantiotropic cholesteric phases. Like in the case of CH8C, the optical pitch (λm) of PCOSE decreased with increasing temperature. PCOE, contrast with PCOSE, did not display reflection colors, suggesting that the helical twisting power of the cholesteryl group highly depends on the length of the spacer joining the cholesteryl group to the main chain. The msophase properties of PCOE and PCOSE were entirely different from those of poly(cholesteryl-ω-acryloyloxyalkanoates). The results indicate that the ode of chemical linkage of the side chain group with the main chain plays an important role in the formation, stabilization, and temperature dependence of λm of the cholesteric mesophase.

폴리(비닐 알코올)을 콜레스테릴 클로로포메이트 또는 8-콜레스테릴옥시카보닐헵타노일 클로라이드(CH8C)와 반응시킴에 의해 폴리[1-(콜레스테릴옥시카보닐옥시)에틸렌](PCOE)와 폴리[1-(콜레스테릴옥시카보닐헵타노일옥시)에틸렌] (PCOSE)를 합성함과 동시에 이들의 열 및 광학 특성을 검토하였다. CH8C는 단방성 콜레스테릭 상을 형성하는 반면 PCOE와 PCOSE는 쌍방성 콜레스테릭 상들을 형성하였다. CH8C의 경우와 같이, PCOSE의 광학피치(λm)는 온도가 상승함에 따라 감소하였다. PCOE는 PCOSE와 달리 반사색깔을 나타내지 않았다. 이러한 사실은 콜레스테릴 그룹에 의한 나선의 비틀림력은 콜레스테릴 그룹과 주사슬을 연결하는 스페이서의 길이에 민감하게 의존함을 시사한다. PCOE와 PCOSE가 나타내는 액정 특성들은 폴리(콜레스테릴-ω-아크릴로일옥시알카노에이트들)이 나타내는 액정 특성들과 전혀 다르다. 이러한 결과들은 곁사슬과 주사슬의 화학결합의 양식이 콜레스테릭 상의 형성능, 안정성 그리고 λm의 온도 의존성에 중요한 역할을 함을 시사한다.

Keywords: poly(vinyl alcohol); cholesterol; optical pitch; mode of chemical linkage

References

1. Pfaff G, Reynders P, Chem. Rev., 99(7), 1963 (1999)
2. Tamaoki N, Adv. Mater., 13, 1135 (2001)
3. Plate NAComb-Shaped Polymers and Liquid Crystals, Plenum Press, New York, Cahp. 4, p. 197 (1987)
4. Shibaev VP, Freidzon YSSide Chain Liquid Crystal Polymers, C. B. McArdle, Editor, Chapman and Hall, Inc., New York, Chap. 9, p 260 (1989)
5. Freidzon YS, Shibaev VPLiquid-Crystal polymers, N. A. Plate, Editor, Plenum Press, New York, Chap. 7, p. 251 (1993)
6. Yusa SI, Kakimoto K, Yamamoto T, Morishima Y, Macromol. Rapid Commun., 22, 253 (2001)
7. Chen SH, Tsai ML, Macromolecules, 23, 5055 (1990)
8. Krishnamurthy S, Chen SH, Macromolecules, 24, 3481 (1991)
9. Arnold M, Poser S, Fisher H, Frank W, Utschick H, Macromol. Rapid Commun., 15, 487 (1994)
10. Fischer H, Poser S, Arnold M, Frank W, Macromolecules, 27(24), 7133 (1994)
11. Fischer H, Poser S, Arnold M, Macromolecules, 28(20), 6957 (1995)
12. Weidner S, Wolff D, Springer J, Liq. Cryst., 20, 587 (1996)
13. Weidner S, Wolff D, Springer J, Macromol. Chem. Phys., 197, 1337 (1996)
14. Weidner S, Wolff D, Springer J, Liq. Cryst., 22, 193 (1997)
15. Bobrovsky AY, Boiko NI, Shibaev VP, Liq. Cryst., 25, 679 (1998)
16. Bobrovsky AY, Boiko NI, Shibaev VP, Liq. Cryst., 27, 57 (2000)
17. Hattori H, Uryu T, J. Polym. Sci. A: Polym. Chem., 38(5), 887 (2000)
18. Stohr A, Strohriegl P, Macromol. Chem. Phys., 199, 751 (1998)
19. Mihara T, Uedaira T, Koide N, Liq. Cryst., 29, 855 (2002)
20. Hu JS, Zhang BY, Jia YG, Wang Y, Polym. J., 35, 160 (2003)
21. Kaneko T, Nagasawa H, Gong JP, Osada Y, Macromolecules, 37(1), 187 (2004)
22. Barmatov EB, Barmatova MV, Moon BS, Park JG, Macromolecules, 37(15), 5490 (2004)
23. Hu JS, Zhang BY, Liu ZJ, Zang BL, J. Appl. Polym. Sci., 86(11), 2670 (2002)
24. Zhang BY, Hu JS, Jia YG, Du BG, Macromol. Chem. Phys., 204, 2123 (2003)
25. Hu JS, Zhang BY, Jia YG, Chen S, Macromolecules, 36(24), 9060 (2003)
26. Hu JS, Zhang BY, Wang Y, Meng FB, J. Polym. Sci. A: Polym. Chem., 42(15), 3870 (2004)
27. Zang BL, Hu JS, Meng FB, Zhang BY, J. Appl. Polym. Sci., 93(6), 2511 (2004)
28. Ogawa H, Stibal-Fisher E, Finkelmann H, Macromol. Chem. Phys., 205, 593 (2004)
29. Hu JS, Zhang BY, Yan G, He XZ, J. Polym. Sci. A: Polym. Chem., 42(20), 5262 (2004)
30. Cha SW, Jin JI, Laguerre M, Achard MF, Hardouin F, Liq. Cryst., 26, 1325 (1999)
31. Harwood SM, Toyne KJ, Gray JW, Parsley M, Gray GW, Liq. Cryst., 27, 443 (2000)
32. Tasaka T, Okamoto H, Morita Y, Kasatani K, Takenaka S, Mol. Cryst. Liq. Cryst., 404, 15 (2003)
33. Jin JI, Mol. Cryst. Liq. Cryst., 267(-), 249 (1995)
34. Sirigu ALiquid Crystallinity in Polymers, A. Ciferri, Editor, VCH Publishers, Inc., New York, Chap. 7, p. 261 (1991)
35. Simmonds DJLiquid Crystal Polymers: From Structures to Applications, A. A. Coller, Editor, Elsevier Applied Science, London and New York, Chap. 7, p. 349 (1992)
36. Percec V, Pugh CSide Chain Liquid Crystal Polymers, C. B. McArdle, Editor, Chapman and Hall, Inc., New York, Chap. 3, p. 30 (1989)
37. Lam JWY, Tang BZ, J. Polym. Sci. A: Polym. Chem., 41(17), 2607 (2003)
38. Kim JH, Ma YD, J. Korean Ind. Eng. Chem., 15(1), 113 (2004)
39. Ma YD, Kim JH, Choi JHIndustrial Technology Research Paper, Dankook University, 3, 27 (2003)
40. Kim JHM. Sc. Dissertation, Dankook University (2000)
41. Jeong SY, Choi JH, Ma YD, Polym.(Korea), 26(4), 523 (2002)
42. Ma YD, Jeong SYIndustrial Technology Research Paper, Dankook University, 5, 21, 5, 21 (2004)
43. Lee JW, Jin JI Achard MF, Hardouin F, Liq. Cryst., 28, 663 (2001)
44. Tsiourvas D, Felekis T, Sideratou Z, Paleos CM, Liq. Cryst., 31, 739 (2004)
45. Gray GW, J. Chem. Soc., 3733 (1956)
46. Jeong SY, Ma YDto be published.
47. Koltzenburg S, Stelzer F, Nuyken D, Macromol. Chem. Phys., 200, 821 (1999)
48. Yelamaggard CV, Mathews M, Fujita T, Iyi N, Liq. Cryst., 30, 1079 (2003)
49. Lam JWY, Kong XX, Dong YP, Cheuk KKL, Xu KT, Tang BZ, Macromolecules, 33(14), 5027 (2000)
50. Lee DW, Jin JI, Laguerre M, Achard MF, Hardouin F, Liq. Cryst., 27, 145 (2000)
51. Cha SW, Jin JJ, Laguerre M, Achard MF, Hardouin F, Liq. Cryst., 26, 1325 (1999)
52. Yelamaggard CV, Srikrishna A, Shankar Rao DS, Krishna Prasad S, Liq. Cryst., 26, 1547 (1999)
53. Yelamaggard CV, Hiremath US, Shankar Rao DS, Liq. Cryst., 28, 351 (2001)
54. Morris NL, Zimmermann RG, Jameson GB, Dalziel AW, Reuss PM, Weiss RG, J. Am. Chem. Soc., 110, 2177 (1988)
55. Mukkamala R, Burns CL, Catchings RM, Weiss RG, J. Am. Chem. Soc., 118(40), 9498 (1996)
56. Yamaguchi T, Asada T, Hayashi H, Nakamura N, Macromolecules, 22, 1141 (1989)
57. For a discussion of the spacer decoupling model and its limitation, see: reference 35.
58. Pugh C, Kiste ALHandbook of Liquid Crystals, D. Demus, J. Goodby, G. W. Gray, H. -W. Spiess, and V. Vill, Editors, Wiley-VCH, Weinheim-New York, Vol. 3, Chap. III, p. 123 (1998)
59. Imrie CT, Karasz FE, Attard GS, Macromolecules, 26, 545 (1993)
60. Shannon PJ, Macromolecules, 16, 1677 (1983)
61. Barrall II EM, Johnson JF, J. Macromol. Sci.-Rev. Macromol. Chem. Phys., C17, 137 (1979)
62. Finkelmann HLiquid Crystallinity in Polymers, A. Ciferri, Editor, VCH Publishers, New York, Chap. 8, p. 315 (1991)
63. Maier W, Saupe A, Naturf Z, 13A, 564 (1958)
64. Maier W, Saupe A, Naturf Z, 14A, 882 (1959)
65. Maier W, Saupe A, Naturf Z, 15A, 287 (1960)
66. Boeffel C, Spiess HWSide Chain Liquid Crystal Polymers, C. B. McArdle, Editor, Chapmann and Hall, Inc., New York, Chap. 8, p. 224 (1989)
67. Lam JWY, Dong YP, Cheuk KKL, Luo JD, Xie ZL, Kwok HS, Mo ZS, Tang BZ, Macromolecules, 35(4), 1229 (2002)
68. Krigbaum WR, Brelsford G, Ciferri A, Macromolecules, 22, 2487 (1989)
69. Ciferri ALiquid Crystallinity in Polymers, A. Ciferri, Editor, VCH Publishers, New York, Chap. 6 p. 209 (1991)
70. Takada A, Fukuda T, Watanabe J, Miyamoto T, Macromolecules, 28(9), 3394 (1995)
71. Imrie CT, Karasz FE, Attard GS, Macromolecules, 26, 3803 (1993)
72. Craig AA, Imrie CT, Macromolecules, 28(10), 3617 (1995)
73. Maughon BR, Weck M, Mohr B, Grubbs RH, Macromolecules, 30(2), 257 (1997)
74. Craig AA, Imrie CT, Macromolecules, 32(19), 6215 (1999)
75. Rodriguez-Parada JM, Duran R, Wegner G, Macromolecules, 22, 2507 (1989)
76. Percec V, Asandei AD, Hill DH, Crawford D, Macromolecules, 32(8), 2597 (1999)
77. Chen BQ, Kameyama A, Nishikubo T, Macromolecules, 32(20), 6485 (1999)
78. Imrie CT, Schleeh T, Karasz FE, Attard GS, Macromolecules, 26, 539 (1993)
79. Kim JH, Jeong SY, Ma YD, Polym.(Korea), 28(1), 92 (2004)
80. Kim JH, Jeong SY, Ma YD, Polym.(Korea), 28(1), 41 (2004)
81. Bhattacharya S, Krishman-Ghosh Y, Mol. Cryst. Liq. Cryst., 381, 33 (2002)
82. Marcelis ATM, Koudijs A, Sudholter EJR, Liq. Cryst., 18, 851 (1995)
83. Marcelis ATM, Koudijs A, Sudholter EJR, J. Mater. Chem., 6, 1469 (1996)
84. Marcelis AT, Koudijs A, Sudholter EJ, Thin Solid Films, 284-285(-), 308 (1996)
85. Marcelis ATM, Koudijs A, Sudholter EJR, Liq. Cryst., 27, 1515 (2000)
86. Tamaoki N, Matsuda H, Takahashi A, Liq. Cryst., 28, 1823 (2001)
87. Shubashree S, Sadashiva BK, Mol. Cryst. Liq. Cryst., 411, 193 (2004)
88. Marcelis ATM, Koudijs A, Sudholter EJR, Mol. Cryst. Liq. Cryst., 411, 193 (2004)
89. Jeong SY, Jeong JH, Ma YD, Tsujii Y, Polym.(Korea), 25(2), 279 (2001)
90. Barrall II EMLiquid Crystals, F. D. Saeva, Editor, Marcel Dekker, Inc., New York and Basel, Chap. 9, p. 335 (1979)
91. Stumpe J, Fischer T, Menzel H, Macromolecules, 29(8), 2831 (1996)
92. Freidzon YS, Tropsha YG, Tsukruk VV, Shilov VV, Shibaev VP, Lipatov YS, Polym. Sci. U.S.S.R(Engl. Tranl.), 29, 1505 (1987)

Polymer(Korea) 폴리머
Frequency : Bimonthly(odd)
ISSN 0379-153X(Print)
ISSN 2234-8077(Online)
Abbr. Polym. Korea
2023 Impact Factor : 0.4
Indexed in SCIE

This Article

2006; 30(1): 35-44

Published online Jan 25, 2006
Received on Sep 2, 2005
Accepted on Jan 9, 2006

This Article

Services

Shared