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Thermotropic Liquid Crystalline Behavior of [4-{4'-(Nitrophenylazo)phenoxycarbonyl}]alkanoated Celluloses  

Jeong, Seung-Yong (Department of Polymer Science and Engineering, Dankook University)
Ma, Yung-Dae (Department of Polymer Science and Engineering, Dankook University)
Publication Information
Polymer(Korea) / v.33, no.1, 2009 , pp. 58-66 More about this Journal
Abstract
The thermotropic liquid crystalline behavior of the homologous series of cellulose tri[4-{4'-(nitrophenylazo) phenoxycarbonyl}] alkanoates (NACEn, n=2$\sim$8, 10, the number of methylene units in the spacer) have been investigated. All of the homologoues formed monotropic nematic phases. The isotropic-nematic transition temperature ($T_{iN}$) decreased when n is increased up to 7, but it became almost constant when n is more than 7. The plot of transition entropy at $T_{iN}$ against n had a sharp negative inflection at n=7. The sharp change at n=7 may be attributed to the difference in arrangement of the side groups. The melting temperature ($T_m$) and associated entropy change at $T_m$, in contrast with $T_{iN}$ and associated entropy change at $T_{iN}$, exhibited a distinct odd-even effect, suggesting that the average shape of the side chains in the crystalline phase is different from that in the nematic phase. The thermal stability and degree of order of the nematic phase observed for NACEn were significantly different from those reported for the homologous series of side-chain and combined type liquid crystal polymers bearing azobenzene or biphenyl units in the side chains. The results were discussed in terms of the differences in the chemical structure, the flexibility of the main chain, the mode of chemical linkage of the side group with the main chain, and the number of the mesogenic units per repeating unit.
Keywords
cellulose; nitroazobenzene; spacer length; nematic phase;
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Times Cited By Web Of Science : 3  (Related Records In Web of Science)
Times Cited By SCOPUS : 2
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1 V. Percec and D. M. Tomazos, Comprehensive Polymer Science, First Supplement, S. L. Aggarwal and S. Russo, Editors, Pergamon Press, Oxford, Chap. 14, p 299 (1992)
2 V. Shibeav, A. Bobrovsky, and N. Boiko, Prog. Polym. Sci., 28, 729 (2003)   DOI   ScienceOn
3 T. Fukuda, Y. Tsujii, and T. Miyamoto, Macromol. Symp., 99, 257 (1995)   DOI   ScienceOn
4 P. Zugenmaier, Handbook 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. Ⅸ, p 453 (1998).
5 S.-Y. Jeong and Y.-D. Ma, Polymer(Korea), 30, 338 (2006)   과학기술학회마을
6 S.-Y. Jeong and Y.-D. Ma, Polymer(Korea), 31, 356 (2007)   과학기술학회마을
7 S.-Y. Jeong and Y.-D. Ma, Industrial Technology Research Paper(Dankook University), 8, 69 (2007)
8 A. T. M. Macelis, A. Koudijs, and E. J. R. Sudholter, Mol. Cryst. Liq. Cryst., 411, 193 (2004)   DOI   ScienceOn
9 Z. Komiya and R. R. Schrock, Macromolecules, 26, 1393 (1993)   DOI   ScienceOn
10 B. Q. Chen, A. Kameyama, and T. Nishikubo, Macromolecules, 32, 6485 (1999)   DOI   ScienceOn
11 C. T. Imrie, F. E. Karasz, and G. S. Attard, Macromolecules, 26, 545 (1993)   DOI
12 J.-W. Lee, J.-I. Jin, B.-W. Jo, J.-S. Kim, W.-C. Zin, and Y.-S. Kang, Acta Polymer, 50, 399 (1999)   DOI
13 X. L. Piao, J.-S. Kim, Y.-K. Yun, J.-I. Jin, and S.-K. Hong, Macromolecules, 30, 2294 (1997)   DOI   ScienceOn
14 T. Yamaguchi, T. Asada, H. Hayashi, and N. Nakamura, Macromolecules, 22, 1141 (1989)   DOI   ScienceOn
15 S.-Y. Jeong and Y.-D. Ma, Polymer(Korea), 32, 230 (2008)   과학기술학회마을
16 E. Chiellini and M. Laus, Handbook 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. 2, p 26 (1998)
17 J.-W. Lee and J.-I. Jin, Bull. Korean Chem. Sci., 21, 957 (2000)
18 X. Hu, P. J. Zheng, X. Y. Zhao, L. Li, K. C. Tam, and L. H. Gan, Polymer, 45, 6219 (2004)   DOI   ScienceOn
19 S.-Y. Jeong and Y.-D. Ma, Polymer(Korea), 31, 37 (2007)   과학기술학회마을
20 B. R. Maughon, M. Weck, B. Mohr, and R. H. Grubbs,Macromolecules, 30, 257 (1997)   DOI   ScienceOn
21 M. Mauzac, F. Hardouim, H. Richard, M. F. Achard, G. Sigaud, and H. Gasparoux, Eur. Polym. J., 22, 137 (1986)   DOI   ScienceOn
22 Z. Komiya, C. Pugh, and R. R. Schrock, Macromolecules, 25, 6586 (1992)   DOI
23 P. A. Gemmell, G. W. Gray, and D. Lacey, Mol. Cryst. Liq. Cryst., 122, 205 (1985)
24 V. P. Shibaev, Liquid-Crystal Polymers, N. A. Plate, Editor, Plenum Press, New York and London, Chap. 6, p 193 (1993)
25 M. Ungerank, B. Winkler, E. Eder, and F. Stelzer, Macromol. Chem. Phys., 196, 3623 (1995).   DOI   ScienceOn
26 Z. Komiya, C. Pugh, and R. R. Schrock, Macromolecules, 25, 3609 (1992)   DOI
27 S.-Y. Jeong and Y.-D. Ma, Polymer(Korea), 30, 35 (2006).   과학기술학회마을
28 Z. Yue and J. M. G. Cowie, Macromolecules, 35, 6572 (2002)   DOI   ScienceOn
29 C. T. Imrie, P. A. Henderson, and J. M. Seddon, J. Mater. Chem., 14, 2486 (2004)   DOI   ScienceOn
30 H. Hou, A. Reuning, J. H. Wendorff, and A. Greiner, Macromol. Chem. Phys., 201, 2050 (2000)   DOI   ScienceOn
31 A. A. Craig and C. T. Imrie, Macromolecules, 28, 3617 (1995)   DOI   ScienceOn
32 A. Ciferri, Liquid Crystallinity in Polymers, A. Ciferri, Editor, VCH Publisher, New York, Chap. 6, p 209 (1991)
33 A. Takada, T. Fukuda, J. Watanabe, and T. Miyamoto, Macromolecules, 28, 3394 (1995)   DOI   ScienceOn
34 C. Pugh and A. L. Kiste, Handbook 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)
35 S. Freiberg, F. Lagugne- Labarthet, P. Rochon, and A. Natansohn, Macromolecules, 36, 2680 (2003)   DOI   ScienceOn
36 S.-Y. Jeong and Y.-D. Ma, J. Korean Ind. Eng. Chem., 18, 475 (2007)
37 V. Percec and C. Pugh, Side Chain Liquid Crystal Polymers, C. B. McArdle, Editor, Chapmann and Hall, New York, Chap. 3, p 30 (1989)
38 S.-Y. Jeong and Y.-D. Ma, Polymer(Korea), 32, 489 (2008)   과학기술학회마을
39 C. Noel, Handbook 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. Ⅱ, p 93 (1998)
40 Y.-D. Ma, Polymer Science Technology, 8, 555 (1997)
41 J. W. Y. Lam, X. Kong, Y. Dong, K. K. L. Cheuk, K. Xu, and B. Z. Tang, Macromolecules, 33, 5027 (2000)   DOI   ScienceOn
42 C. Wu, Q. Gu, Y. Huang, and C. Chen, Liq. Cryst., 30, 733 (2003)   DOI   ScienceOn
43 H. Finkelmann, M. Happ, M. Portugall, and H. Ringsdorf, Makromol. Chem., 179, 2541 (1978)   DOI
44 J.-H. Kim, S.-Y. Jeong, and Y.-D. Ma, Polymer (Korea), 28, 41 (2004)   과학기술학회마을
45 M. Sato, M. Hayakawa, K. Nakagawa, K.-I. Mukaida, and H. Fujiwara, Macromol. Rapid Commun., 15, 21 (1994)   DOI
46 B. Huang, J. J. Ge, Y. Li, and H. Hou, Polymer, 48, 264 (2007)   DOI   ScienceOn
47 B. Winkler, M. Ungerank, and F. Stelzer, Macromol. Chem. Phys., 197, 2343 (1996)   DOI   ScienceOn
48 S.-Y. Jeong and Y.-D. Ma, J. Korean Ind. Eng. Chem., 19, 504 (2008)
49 J. W. Y. Lam and B. Z. Tang, J. Polym. Sci. Part A: Polym. Chem., 41, 2607 (2003)   DOI   ScienceOn
50 S.-Y. Jeong, J.- H. Jeong, Y.-D. Ma, and Y. Tsujii, Polyme(Korea), 25, 279 (2001)   과학기술학회마을
51 P. A. Henderson, R. T. Inkster, J. M. Seddon, and C. T. Imrie, J. Mater. Chem., 11, 2722 (2001)   DOI   ScienceOn
52 Y. Sui, Y.-G. Liu, J. Gao, Z.-K. Zhu, D. Y. Huang, and Z.-G. Wang, J. Polym. Sci. Part A: Polym. Chem., 37, 4330 (1999)   DOI   ScienceOn
53 Q. Zhoi, L. Zhang, H. Okamura, M. Minoda and T. Miyamoto, J. Polym. Sci. Part A: Polym. Chem., 39, 376 (2001)   DOI   ScienceOn
54 V. Percec, A. D. Asandei, D. H. Hill, and D. Crawford, Macromolecules, 32, 2597 (1999)   DOI   ScienceOn
55 J. -H. Kim, S.-Y. Jeong, and Y. -D. Ma, Polymer(Korea), 28, 92 (2004)   과학기술학회마을
56 M. Yalpani, Polysaccharides, Elsevier, New York, Chap. 4, p 83 (1998)
57 A. M. Donald and A. H. Windle, Liquid Crystal Polymers, Cambridge University Press, Cambridge, Chap. 3, p 50 (1992)
58 S.-Y. Jeong and Y.-D. Ma, Polymer(Korea), 32, 169 (2008)   과학기술학회마을
59 K. Anderle and J. H. Wendorff, Mol. Cryst. Liq. Cryst., 243, 51 (1994)   DOI   ScienceOn
60 M. Han and K. Ichimura, Macromolecules, 34, 90 (2001)   DOI   ScienceOn
61 A. A. Craig and C. T. Imrie, Macromolecules, 32, 6215 (1999)   DOI   ScienceOn
62 P. Maganini, Thermotropic Liquid Crystal Polymer Blends, F. P. La Mania, Editor, Technonic Publishing Company, Inc., Western Hemisphere, Chap. 1, p 7 (1993)
63 B. Reck and H. Ringsdorf, Makromol. Chem. Rapid Commun., 7, 389 (1986)   DOI
64 A. A. Craig and C. T. Imrie, J. Mater. Chem., 4, 1705 (1994)   DOI   ScienceOn
65 J.-H. Liu and P.-C. Yang, J. Appl. Polym. Sci., 91, 3693 (2004)   DOI   ScienceOn
66 M. Tokita and J. Watanabe, Polym. J., 38, 611 (2006)   DOI   ScienceOn