Skip to main content
SpringerLink
Log in

Thermotropic copolyesters modified with nonmesogenic rigid groups

  • Published:
Polymer Bulletin Aims and scope Submit manuscript

Summary

Two series of copolyesters of sebacic acid, 4,4′-biphenol and a nonmesogenic rigid diol which was either bisphenol A (BPA series) or hydroquinone (HQ series) were prepared by melt polycondensation. The thermal transitions and melt birefringence which were investigated by DSC and polarized microscope respectively. Homopolyester of 4,4-biphenol and sebacic acid (PB8) was found to show two transition temperatures corresponded to Tm and Ti respectively. For the BPA series, the incorporation of amorphous bisphenol A unit by copolymerization decreased both Tm and Ti and completely destroyed the mesophase as the content of bisphenol A unit was over 50 mole%. For the HQ series, the incorporation of crystalline hydroquinone unit decreased Tm to more extent, but decreased Ti to less extent as compared to the BPA series. When the hydroquinone unit was as high as 80 mole%, the mesophase was completely destroyed.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. A. Blumstein, K. N. Sivaramakrishnan, R. B. Blumstein and S. B. Clough, Polymer,23, 47 (1982).

    Article  CAS  Google Scholar 

  2. J. Asrar, H. Toriumi, J. Watanabe, W. R. Krigbaum, A. Cifferi, and J. Preston, J. Polym. Sci. Polym. Phys. Ed.,21, 1119 (1983).

    Article  CAS  Google Scholar 

  3. W. R. Krigbaum, J. Watanabe, and T. Ishikawa, Macromolecules,16, 1271 (1983).

    Article  CAS  Google Scholar 

  4. J. Watanabe and W. R. Krigbaum, Macromolecules,17, 2288 (1984).

    Article  CAS  Google Scholar 

  5. J. Watanabe and W. R. Krigbaum, J. Polym. Sci. Polym. Phys. Ed.,23, 565 (1985).

    Article  CAS  Google Scholar 

  6. J. Watanabe, K. Ikeda and W. R. Krigbaum, J. Polym. Sci. Part B: Polym. Phys.,25, 19(1987).

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Union Chemical Laboratories, Industrial Technology Research Institute, 321, Kuang Fu Road, Sec. 2, 30042, Hsinchu, Taiwan, Republic of China

    Hong-Bing Tsai, Chyun Lee, Nien-Shi Chang & Andrew Teh Hu

Authors
  1. Hong-Bing Tsai
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Chyun Lee
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Nien-Shi Chang
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Andrew Teh Hu
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Tsai, HB., Lee, C., Chang, NS. et al. Thermotropic copolyesters modified with nonmesogenic rigid groups. Polymer Bulletin 24, 293–297 (1990). https://doi.org/10.1007/BF00306577

Download citation

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00306577

Keywords

Search

Navigation