A study on blends of liquid crystalline copolyesters with polycarbonate. II. Transesterification control

Kung-Hwa Wei*, Koe Fu Su

*Corresponding author for this work

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

The inhibited and catalyzed ester exchange (transesterification) during melt blending of poly(bisphenol-A carbonate) (PC) and liquid crystalline poly(oxybenzoate-co-ethylene terephthalate) (POB-PET 40/60; P46) was investigated with differential scanning calorimetry. It was found that the ester exchange between P46 and PC was effectively inhibited for a 20% P46 blend at 240°C, as further confirmed by nuclear magnetic spectroscopy. When the blending temperature and P46 concentration increased, only the transesterification between the PET segment in P46 and PC took place under inhibition. The morphology of the blends was analyzed with scanning electron microscopy and displayed a disconnected interface between P46 and PC under inhibition. Conversely, the transesterification took place between the POB segment in P46 and PC when a catalyst was added.

Original languageEnglish
Pages (from-to)787-796
Number of pages10
JournalJournal of Applied Polymer Science
Volume59
Issue number5
DOIs
StatePublished - 31 Jan 1996

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