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Russian Chemical Bulletin

, Volume 42, Issue 10, pp 1673–1676 | Cite as

The role of the pyrimidine ring in the main chain of polyamic acids and polyimides

3. Comparison of properties of polypyromellitamic acids based on 2,5-bis(p-aminophenyl)pyrimidine and 4,4″-diaminoterphenyl
  • V. N. Artem'eva
  • V. V. Kudryavtsev
  • E. M. Nekrasova
  • V. P. Sklizkova
  • N. G. Belnikevich
  • L. M. Kaluzhnaya
  • I. G. Silinskaya
  • O. P. Shkurko
  • V. P. Borovik
Physical Chemistry

Abstract

A comparative study of the behavior of polypyromellitamic acids based on 2,5-bis(p-aminophenyl)pyrimidine and 4,4″-diaminoterphenyl in concentrated dimethylacetamide solutions was carried out by the light-scattering method. It was shown that mutual ordering of the scattering elements is much higher for the pyrimidine-containing polyamic acids than for benzenoid polyamic acids. The Flory-Huggins parameters of the polymer-solvent interaction thus determined indicate that the polymer-polymer interactions increase when a pyrimidine ring is introduced into the polyamic acid or polyimide. Hence, the hypothesis postulating that the amide solvent is displaced by the pyrimidine ring during the shear packing of pyrimidine-containing polymers is confirmed.

Key words

polyimide polypyromellitamic acid 2,5-bis(p-aminophenyl)pyrimidine 

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Copyright information

© Plenum Publishing Corporation 1994

Authors and Affiliations

  • V. N. Artem'eva
    • 1
  • V. V. Kudryavtsev
    • 1
  • E. M. Nekrasova
    • 1
  • V. P. Sklizkova
    • 1
  • N. G. Belnikevich
    • 1
  • L. M. Kaluzhnaya
    • 1
  • I. G. Silinskaya
    • 1
  • O. P. Shkurko
    • 2
  • V. P. Borovik
    • 2
  1. 1.Institute of Macromolecular CompoundsRussian Academy of SciencesSt. PetersburgRussian Federation
  2. 2.Novosibirsk Institute of Organic ChemistrySiberian Branch of the Russian Academy of SciencesNovosibirskRussian Federation

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