Poly(4-vinylpyridine)/vinyl acetate-vinyl alcohol copolymer blends: 2. Phase behavior

Joon Youl Lee, Dong Hoon Choi, Hyeok Lee

Research output: Contribution to journalArticlepeer-review


Miscibility of poly(4-vinylpyridine) (P4VP) blends with poly(vinyl acetate-co-vinyl alcohol) (VAc-VAL copolymers) was investigated as a function of comonomer composition of VAc-VAL copolymers. Differential scanning calorimetry (DSC) and thermo-optical microscopic (TOM) analysis confirmed that P4VP is miscible with VAc-VAL copolymers containing more than 30 mole% VAL. Fourier transform infrared (FT-IR) spectroscopic analysis revealed that the strong intermolecular hydrogen bonding interaction between the vinylpyridine and VAL hydroxyl group was formed. Theoretical phase diagram was constructed by the calculation using the Association model, a thermodynamic model for hydrogen-bonded polymer blend systems developed by Coleman et al. The calculated theoretical binodal phase diagrams were in good agreement with the experimentally determined cloud point curves.

Original languageEnglish
Pages (from-to)649-656
Number of pages8
JournalPolymer (Korea)
Issue number5
Publication statusPublished - 2001
Externally publishedYes


  • Association model
  • Binodal phase diagrams
  • Cloud point curves
  • Intermolecular hydrogen bonding interaction
  • Miscibility
  • Poly(4-vinylpyridine)
  • Poly(vinyl acetate-co-vinyl alcohol)

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Polymers and Plastics
  • Materials Chemistry


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