Influence of conformational parameters on physical properties of polyimides containing methylene bridges

Stefan Chisca*, Inga A. Ronova, Ion Sava, Vera A. Medvedeva, Maria Bruma

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Conformational parameters, and free and Van der Waals volume values for a group of polymers containing methylene bridges, some of them having methyl substituents as well, have been calculated and correlated with physical properties such as solubility, glass transition and decomposition temperature, tensile stress and dielectric constant which were measured for these polymers. Thus, it was shown that conformational rigidity determines the packing of macromolecules in solid state, and therefore the free volume, and glass transition temperature and dielectric constant. The presence of methyl substituents and other flexible groups such as isopropylidene, carbonyl or hexafluoroisopropylidene has a more complex effect on the values of mechanical properties.

Original languageEnglish (US)
Pages (from-to)38-44
Number of pages7
JournalMateriale Plastice
Volume48
Issue number1
StatePublished - Mar 2011
Externally publishedYes

Keywords

  • Conformational parameters
  • Dielectric constant
  • Glass transition
  • Polyimides
  • Thin films

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics
  • Chemistry(all)
  • Mechanics of Materials

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