Polymer Bulletin

, 24:305 | Cite as

An absolute measure for stereoblock and heterotactic polymers

  • Ishrat M. Khan
Article
Accepted:

Summary

A criterion (°) for testing stereoblock and heterotactic polymers is developed. The criterion takes values between 1 and-1, a value of 1 is indicative of a pure stereoblock polymer and a value of-1 indicates a pure heterotactic polymer. The criterion (°) is compared with persistence ratio (ρ) and average stereochemical sequence length. The importance of δ as an aid in the synthesis of stereoblock polymers is discussed.

Keywords

PMMA Ethylacrylate PMEA Polymer Bulletin Stereochemical Characteristic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

  1. 1.a)
    M.A. Doherty, T.E. Hogen-Esch, Polymer Preprints,25 (2), 5 (1984)Google Scholar
  2. 1.b)
    M.A. Doherty, T.E. Hogen-Esch, Makromol. Chem.,187, 61 (1986).CrossRefGoogle Scholar
  3. 2.
    F.A. Bovey, High Resolution NMR of Macromolecules, Academic, NY (1972).Google Scholar
  4. 3.
    J.C. Randall, E.T. Hsieh, NMR and Macromolecules, ACS Symposium Series,247, 131 (1984).CrossRefGoogle Scholar
  5. 4.
    R.C. Subramanian, R.D. Allen, J.E. McGrath, T.C. Ward, Polymer Preprints,26 (2), 238 (1985).Google Scholar
  6. 5.
    K. Seki, D.A. Tirrell, Polymer Preprints,24 (2), 29 (1983).Google Scholar
  7. 6.
    I.M. Khan, T.E. Hogen-Esch, Macromolecules,20, 2335 (1987).CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • Ishrat M. Khan
    • 1
  1. 1.Department of ChemistryClark Atlanta UniversityAtlantaUSA

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