화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea Polymer Journal, Vol.7, No.1, 58-63, February, 1999
Export Citation
Effect of Shearing on the Liquid Crystallinity of Polymer Blends Containing Thermotropic Liquid Crystalline Polyurethane
Dong-Jin Lee†, Tae Jung Lee, Han Do Kim, and Toshiyuki Uryu1
  • Department of Textile Engineering, Pusan National University, Pusan 609-735, Korea
  • 1Institute of Industrial Science, University of Tokyo, Roppongi, Minato-ku, Tokyo 106, Japan
E-mail:
Thermotropic polyurethanes (PUnT; n=2, 6, 8, 11) were synthesized from 4,4''''-bis(ω-hydroxyalkoxy)biphenyls (BPn; 2, 6, 8, 11) and 2,5-tolylene diisocyate (2,5-TDI). Polymer blends compositions. The effect of shearing on the liquid crystallinity of the polymer blends was investigated through differential scanning calorimetry (DSC) measurement, polarized optical microscope observation, and X-ray diffractometry. The liquid crystallinity was shown in the polymers PU6T, PU8T and PU11T but it was not in PU2T. Polymer blends PU6T/PU8T and PU8T/PU11T showed a monotropic liquid crystallinity, however, PU2T/PU11T did not.
  1. Lee JB, Kato T, Yoshida T, Uryu T, Macromolecules, 26, 4986 (1993) 
  2. Lee JB, Kato T, Ujiie S, Iimura K, Uryu T, Macromolecules, 28(7), 2165 (1995) 
  3. Lee JB, Kato T, Uryu T, Polym. J., 27, 664 (1995) 
  4. Smyth G, Valles EM, Pollack SK, Grebowicz J, Stenhouse PJ, Hsu SL, MacKnight WJ, Macromolecules, 23, 3389 (1990) 
  5. Lee DJ, Lee JB, Koide N, Akiyama E, Uryu T, Macromolecules, 31(4), 975 (1998) 
  6. Grevecoeur G, Groeninckx G, Polym. Eng. Sci., 30, 532 (1990) 
  7. Bassett BR, Yee AF, Polym. Compos., 11, 10 (1990) 
  8. Blizzard KG, Federici C, Federico O, Chapoy LL, Polym. Eng. Sci., 30, 1442 (1990) 
  9. Sukhadia AM, Dome M, Baird DG, Polym. Eng. Sci., 30, 519 (1990) 
  10. Kim WN, Denn NM, J. Rheol., 36, 1477 (1992) 
  11. Won HJ, Yim H, Kwon IH, Son TW, Polym. J., 24, 519 (1992) 
  12. Zhong Y, Xu J, Zeng H, Polym. J., 24, 999 (1992) 
  13. Schleeh T, Salamon L, Hinrichsen G, Kossmehl G, Makromol. Chem., 194, 2771 (1993) 
  14. Ballauff M, Polym. Adv. Technol., 1, 109 (1990) 
  15. Bafna SS, Sun T, Baird DG, Polymer, 28, 2130 (1993) 
  16. Baird DG, Bafna SS, De Souza JP, Sun T, Polym. Compos., 14, 214 (1993) 
  17. Bafna SS, Sun T, Desouza JP, Baird DG, Polymer, 36(2), 259 (1995) 
  18. Taesler C, Kricheldorf HR, Petermann J, J. Mater. Sci., 29(11), 3017 (1994) 
  19. Taesler C, Petermann J, Kricheldorf HR, Innovations Mater. Res., 1, 89 (1996)
  20. Seppala JV, Heino MT, Kapanen C, J. Appl. Polym. Sci., 44, 1051 (1992) 
  21. Heino MT, Seppala JV, J. Appl. Polym. Sci., 44, 2185 (1992) 
  22. Gray GW, Windsor PA, Liquid Crystals and Plastic Crystals, Halsted Press, N.Y., vol. 1, pp. 20 (1974)
  23. Kohli A, Chung N, Weiss RA, Polym. Eng. Sci., 29, 573 (1989) 
  24. Siegmann A, Dagan A, Kenig S, Polymer, 26, 1325 (1985) 
  25. Lee DJ, Uryu T, Macromolecules, 31(21), 7142 (1998) 
  26. Lee DJ, Uryu T, Sen-I Gakkaishi, 54, 246 (1998)
  27. Pollack SK, Shen DY, Hsu SL, Wang Q, Stidham HD, Macromolecules, 22, 551 (1989) 
  28. Francescangeli O, Yang B, Laus M, Angeloni AS, Galli G, Chiellini E, J. Polym. Sci. B: Polym. Phys., 33(4), 699 (1995) 
  29. Hirata T, Sato M, Mukaida K, Macromol. Chem. Phys., 195, 2267 (1994)