Phase behavior and morphological studies of polyimide PVP/solvent/water systems by phase inversion

Jong Hak Kim, Byoung Ryul Min, Hyun Chae Park, Jongok Won, Yong Soo Kang

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

The solubility gaps for poly(vinyl pyrrolidone) (PVP) in four polyimide solutions (NMP, DMF, GBL, DMSO) were determined by cloud point measurement and correlated with χPI/Solvent and ΔδPVP/Solvent. Membranes prepared with NMP and DMF systems showed a tendency of suppressing fingerlike structure with addition of PVP. On the other hand, membranes prepared with GBL and DMSO systems showed an inclination toward inducing macrovoid formation. These effects of PVP on the membrane morphology were explained by means of miscibility gap, viscosity of the polymer solution, polymer-polymer phase separation, and overall porosity.

Original languageEnglish
Pages (from-to)3481-3488
Number of pages8
JournalJournal of Applied Polymer Science
Volume81
Issue number14
DOIs
Publication statusPublished - 2001 Sep 29

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry

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