Effect of the chemical structure of aromatic-cycloaliphatic copolyimide films on their surface morphology, relaxation behavior and dielectric properties

Stefan Chisca, Valentina Elena Musteata, Iuliana Stoica, Ion Sava*, Maria Bruma

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Aromatic - cycloaliphatic copolyimides are synthesized by polycondensation reaction of dimethylsubstituted diamine-diphenyl methane with a mixture of an aromatic dianhydride namely benzophenonetetracarboxylic dianhydride (BTDA) with a cycloaliphatic dianhydride namely 1, 2, 3, 4-cyclopentanetetracarboxylic dianhydride (CPDA) taken in various molar ratios. The resulted copolyimides are characterized with regard to their solubility, inherent viscosity, molecular weight distribution and thermal stability. The quality of free-standing films prepared from the polymers is thoroughly studied by atomic force microscopy (AFM) technique. Dielectric properties of four representative films are investigated in detail in a large frequency range, from 1 to 106 Hz, and in a wide temperature domain, from -150 to 300 C, and their variations are correlated with polymer structure and composition.

Original languageEnglish (US)
Article number111
JournalJournal of Polymer Research
Volume20
Issue number3
DOIs
StatePublished - Jul 5 2013

Keywords

  • Aromatic-cycloaliphatic copolyimides
  • Dielectric properties
  • Morphology
  • Relaxation
  • Thin films

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Effect of the chemical structure of aromatic-cycloaliphatic copolyimide films on their surface morphology, relaxation behavior and dielectric properties'. Together they form a unique fingerprint.

Cite this