RANDOM COPOLYMER BLENDS OF STYRENE, PARA-FLUORO STYRENE AND ORTHO-FLUORO STYRENE

AACM OUDHUIS, G TENBRINKE, FE KARASZ

Research output: Contribution to journalComment/Letter to the editorAcademicpeer-review

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Abstract

This study completes the investigation of the phase behaviour of polymer blends involving styrene (S), ortho-fluoro styrene (oFS) and para-fluoro styrene (pFS). As before, due to the proximity of the glass transition temperatures of most blends investigated, the miscibility or immiscibility is established using the alternative thermal analysis method based on enthalpy recovery of samples annealed in the glassy state. In most respects the phase behaviour is similar to that of the corresponding chlorinated systems. The value of the Flory-Huggins parameter chi(S,oFS) is much smaller than chi(S,pFS). However, the latter is approximately the same as chi(oFS,pFS) and, as a consequence, a miscibility window as found in the system PS/P(oClS-co-pClS) is only present in PS/P(oFS-co-pFS) blends for rather low molecular weights.

Original languageEnglish
Pages (from-to)1991-1994
Number of pages4
JournalPolymer
Volume34
Issue number9
DOIs
Publication statusPublished - 1993

Keywords

  • COPOLYMER BLENDS
  • PHASE BEHAVIOR
  • INTRAMOLECULAR REPULSION
  • STYRENE
  • FLUORINATED STYRENE
  • SEQUENCE DISTRIBUTION
  • ENTHALPY RELAXATIONS
  • BLOCK COPOLYMERS
  • PHASE-BEHAVIOR
  • POLYMER BLENDS
  • MISCIBILITY
  • POLYSTYRENE

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