Water sorption and activation energy in polyimide thin films

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Abstract

The water sorption behavior and the activation energy were investigated for various chemical structure polyimide thin films; BPDA-PDA, BPDA-ODA, PMDA-ODA, and 6FDA-ODA. The activation energy for the water diffusion varied in the range of 5.53 to 9.27kcal/mol, and was in the increasing order: BPDA-PDA < BPDA-ODA < PMDA-ODA < 6FDA-ODA. BPDA-PDA and BPDA-ODA polyimide films showed relatively well-ordered morphological structure, which results in relatively low diffusion coefficient and high activation energy. It was found that the diffusion coefficient and the activation energy are significantly related to the in-plane orientation, crystallinity, and packing order in the polyimide thin films. The morphological structure was predominant factors for the water diffusion coefficient and activation energy in the polyimide thin films.

Original languageEnglish
Pages (from-to)2714-2720
Number of pages7
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume38
Issue number21
DOIs
Publication statusPublished - 2000 Nov 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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