The role of partial miscibility on the properties of ternary blends of liquid crystalline copolyesters and polyetherimide

Kung-Hwa Wei*, Horng Long Tyan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Binary blends of liquid crystalline copoly(oxybenzoate-p-ethylene terephthalate) at molar ratio 60/40, POB-PET, and polyetherimide (PEI) were investigated with differential scanning calorimetry and polarised optical microscopy. It was found that POB-PET and PEI were partially miscible when PEI was the major component. Adding a small amount (5 phr) of POB-PET to the originally immiscible blends of liquid crystalline copoly(oxybenzoate-naphthalate) (73/27), Vectra, and PEI resulted in better interfacial adhesions between Vectra and PEI as evidenced by the morphological observations with scanning electron microscopy. The enhancement in the interfacial adhesions caused an increase in the ultimate tensile strength and the impact strength of these ternary blends of Vectra, POB-PET and PEI as compared to that of the corresponding binary blends of Vectra and PEI in an injection molding process.

Original languageEnglish
Pages (from-to)2103-2109
Number of pages7
JournalPolymer
Volume39
Issue number11
DOIs
StatePublished - 1 Jan 1998

Keywords

  • Miscibility
  • Polyetherimide
  • Tensile

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