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Studies on blends of a thermotropic liquid crystalline polymer and polybutylene terephthalate

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Summary

Structure-property relationships of blends of a thermotropic polyester-type main-chain LCP and polybutylene terephthalate (PBT) were investigated. LCP was melt blended with three different PBTs and the blends were processed by injection moulding or extrusion. Mechanical and thermal properties of the blends were determined and the blend structure was characterized by scanning electron microscopy (SEM). LCP acted as mechanical reinforcement for PBT and improved also its dimensional and thermal stability. The stiffness of PBT increased with increasing LCP content, but at the same time the blends became more brittle. In extrusion the orientation of LCP phases could be further enhanced by additional drawing, which led to significant improvements in strength and stiffness at LCP contents of 20–30 wt.-%.

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References

  1. Jackson W J Jr., Kuhfuss H F (1976) J Polym Sci, Polym Chem Ed 14: 2043.

    Google Scholar 

  2. Chung T-S (1986) Polym Eng Sci 26: 901.

    Google Scholar 

  3. Schacht T (1986) Spritzgiessen von Liquid-Crystal Polymeren, Doctoral Thesis, Rheinisch-Westfälischen Technischen Hochschule Aachen, Germany.

  4. Ide Y, Ophir Z (1983) Polym Eng Sci 23: 261.

    Google Scholar 

  5. Ophir Z, Ide Y (1983) Polym Eng Sci 23: 792.

    Google Scholar 

  6. Sawyer L C, Jaffe M (1983) J Mat Sci 21: 1897.

    Google Scholar 

  7. Brostow W, Dziemianowicz T S, Romanski J, Werber W (1988) Polym Eng Sci 28: 785.

    Google Scholar 

  8. Kimura M, Porter R S (1984) J Polym Sci, Polym Phys Ed 22: 1697.

    Google Scholar 

  9. Joseph E G, Wilkes G L, Baird D G, Preliminary Thermal and Structural Studies of Blends Based on a Thermotropic Liquid Crystalline Copolyester and Poly-(ethylene) Terephtalate. In A. Blumstein (ed.) Polymeric Liquid Crystals. Plenum Press, New York and London, pp. 197–216.

  10. Siegmann A, Dagan A, Kenig S (1985) Polymer 26: 1325.

    Google Scholar 

  11. Weiss R A, Chung N, Kohli A (1989) Polym Eng Sci 29: 573.

    Google Scholar 

  12. Blizard K G, Baird D G (1986) Polym News 12: 44.

    Google Scholar 

  13. Min K, White J L, Fellers J F (1984) Polym Eng Sci 24: 1327.

    Google Scholar 

  14. Baird D G, Sun T, Done D S, Wilkes G L (1990) J Thermoplast Composite Mat 3: 81.

    Google Scholar 

  15. Seppälä J V, Heino M T, Kapanen C (1992) J Appl Polym Sci 44: 1051.

    Google Scholar 

  16. Heino M T, Seppälä J V (1992) Int J of Materials and Product Technology 7: 56.

    Google Scholar 

  17. Ramanathan R, Blizard K., Baird D (1988) SPE ANTEC 46: 1123.

    Google Scholar 

  18. Nobile M R, Amendola E, Nicolais L, Acierno D, Carfagna C (1989) Polym Eng Sci 29: 55.

    Google Scholar 

  19. Malik T M, Carreau P J, Chapleau N (1989) Polym Eng Sci 29: 600.

    Google Scholar 

  20. Kohli A, Chung N, Weiss R A (1989) Polym Eng Sci 29: 573.

    Google Scholar 

  21. Heino M T, Seppälä J V (1992) J Appl Polym Sci 44: 2185.

    Google Scholar 

  22. Kiss G (1987) Polym Eng Sci 27: 410.

    Google Scholar 

  23. Isayev A I, Modic M (1987) Polym. Compos. 8: 158.

    Google Scholar 

  24. Vectra Flüssigkristalline Polymere (LCP), brochure by Hoechst Celanese, September 1989/1. Auflage.

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Authors and Affiliations

  1. Department of Chemical Engineering, Helsinki University of Technology, Kemistintie 1, SF-02150, Espoo, Finland

    Markku T. Heino & Jukka V. Seppälä

Authors
  1. Markku T. Heino
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  2. Jukka V. Seppälä
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Heino, M.T., Seppälä, J.V. Studies on blends of a thermotropic liquid crystalline polymer and polybutylene terephthalate. Polymer Bulletin 30, 353–360 (1993). https://doi.org/10.1007/BF00343072

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