經過設計而形成之一系列以氰基聯苯為側鏈液晶基之側鏈型聚亞醯胺液晶高分子，簡稱為BPDA-nCBBP。這一系列的側鏈型液晶高分子唯一不同的地方就是具有不同的間基數目，在這篇研究中，吾人針對液晶相結構的特徵以及如何由液晶相形成結晶相的過程，提出一個合理的解釋。
藉由一系列之X光繞射實驗之結果可以推論芳香族聚亞醯胺主鏈，cyanobiphenyl側鏈基團會於液晶相中會分別形成主鏈層與側鏈層(backbone layers and side-chain layers)，而主鏈層與側鏈層將以某一特別的順序進行交叉堆疊，並且進行週期性的排列。間基的數目對於液晶相的規則性以及穩定性之影響，也藉由兩階段的熔融實驗得知。並且由此實驗可更加了解液晶相的性質。在纖維樣品中，液晶相可以進而形成一個由高度非等向性之單位晶格所構成的斜方晶體。由主鏈層與側鏈層以一定的順序進行週期排列的結果可以推導出一個分子堆積模型，而此模型剛好可以解釋由液晶相所進一步形成之斜方晶體的特徵。此斜方晶系最後會形成一個低對稱性且具有巨大單位晶格之結晶相，最後吾人將對於這一個排列方式演變的過程提出一個合理的解釋。

For a series of designed side-chain liquid crystalline polyimides different only in the length of aliphatic spacer, abreacted as BPDA-nCBBP, the linkage of liquid crystal phase structural features to the crystal growth is studied in this research. An anisotropic ordered pattern with large stacking periodicity in liquid crystal phase was recognized by two-dimensional X-ray diffraction patterns. The separation of cyanobiphenyl side groups and backbones into disparate sheet-type molecular entities arising with a specific stacking sequence was derived accordingly. The role of aliphatic spacer in the construction of liquid crystal phase, including stacking regularity and stability, has been analyzed through a two-step melting process, which further reveals the nature of liquid crystal phase. In the fiber sample, this liquid crystal phase can further develop into an orthorhombic crystal phase constituted by highly anisotropic unit cells. A molecular packing model derived according to the stacking sequence of sheet-type entities in the liquid crystal phase is able to interpret the packing features of orthorhombic phase. As this orthorhombic phase transferred to a crystalline phases which have low symmetry and big unit cell, these packing features were preserved, which suggested a possible pathway for structural evolution.

1. Reinitzer F., Monatsch, Chem. 1888, 9, 421.
2. Lehmann O., Physic. Chem. 1888, 4, 462.
3. Roviello A., Sirign A., J. Polym. Sci. Polym. Lett. 1975, 13, 455.
4. De Gennes P. G., C. R. Acad. Sci. Paris 1975, 281B, 101.
5. Ruviello A., Sirigu A., J. Polym. Sci., Polym. Lett. Ed. 1975, 13, 455; Eur. Polym. J. 1979, 15, 61; 1979, 15, 423; Makromol. Chem. 1982, 183, 895.
6. Jackson W. J., Jr.; Kuhfuss H. J., J. Polym. Sci., Polym. Chem.Ed. 1976, 14, 2043.
7. Menrisse P., Noel C.,Monnerie L.,Fayolle B., Br. Polym. J. 1981, 13, 55
8. Griffin A. C., Havens S. J., J. Polym. Sci., Polym. Phys. Ed.1981,
19, 951.
9. Anton S., Lenz R. W., Jin J. I., J. Polym. Sci., Polym. Chem.Ed.
1981, 19, 1901.
10. Blumstein A., Thomas O., Macromolecules 1982,15,1264.; Blumstein R. B., Stickles E. M., Blumstein A., Mol. Cryst. Liq. Cryst.(Lett.) 1982,82, 205.
11. Blumstein A., Vilasagar S., Ponrathnam S., Clough S.
B., Maret G., J. Polym. Sci., Polym. Phys. Ed. 1982,20,877. ; Blumstein R. B., Stickles E. M., Gauthier M., Blumstein A., Volino F., Macromolecules 1984, 17, 177.
12. Krigbaum W. R., Astar J., Toriumi H., Ciferri A., Preston J., J.
Polym. Sci., Polym. Lett. Ed. 1982,20,109.; Krigbaum W.R.,
Watanabe J., Polymer 1983, 24, 1299.
13. Lenz R. W., Jin J. I., Macromolecules 1981, 414, 1405.; Ober
C. K., Jin J. I., Lenz R. W., Polym. J. 1982,14,9.; Lenz R. W., Faraday Discuss. Chem. 1985, 79, 21.
14. Micelization K. L., Solubilization and Microemulsions, Plenum
Press.New York, 1997.
15. Anne-Marie Giroud-Godquin., Mol. Cryst.1981, 66,147.
16. Neville A. C., Caveney J., Biol. Rev.1961, 44, 531.
17. Finkelmann H., Rehage G., Adv. Polym. Sci. 1984, 60, 99.
18. Bernal J. D., Crowfoot D., Trans. Faraday Soc. 1933, 29, 1032.
19. Levelut A.-M., Lambert M., C. R. Acad Sci. (Paris) 1971, 272B, 1018.
20. Levelut A.-M., Doucet J., Lambert M., J. Physique(France), 1974, 35, 773.
21. Levelut A.-M., J. Physique Coll. (France), 1976, 37, C3-51.
22. Doucet J., Levelut A.-M., J. Physique (France), 1977, 38, 1163.
23. Richardson R.M., Leadbetter A.J., Frost J.C., Ann. Phys. 1978, 3, 177.
24. Goodby J. W., ”Ferroelectric Liquid Crystals: Principles,
Properties and Applications”; 1991.
25. Ge J. J., Zhang A., Macromolecules 1997, 30, 6498.
26. Ge J. J., Zhang A., McCreight K. W., Wang S. Y., Harris F. W., Cheng S. Z. D., Macromolecules 1998, 31, 4093.
27. Ge J. J., Honigfort P. S., Ho R. M., Wang S. Y., Harris F. W., Cheng S. Z. D., Macromol. Chem. Phys. 1999, 200, 31.

28. Ruan J., Ge J. J., A. Zhang, Shi J., Wang S. Y., Harris F. W., Cheng S. Z. D., Macromolecules 2002, 35, 736.
29. Wang S. Y., Ph D. Dissertation., Department of Polymer Science, The University of Akron, Akron, OH 44325-3909, 1995.
30. Ruan J., Jin S., Ge J. J., Jeong K. U., Graham M. J., Zhang D., Harris F. W., Lotz B., Cheng S. Z.D., Polymer 2006, 47, 4182.
31. Athene D., Alan W., Simon H., Liquid Crystalline Polymers Second Edition, Chap5 Cambridce.