Flory-huggins interaction parameters of LCP/thermoplastic blends measured by DSC analysis

X. L. Xie, R. K.Y. Li, S. C. Tjong, Chak Yin Tang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)

Abstract

Liquid crystalline polymer/polyamide 66 (LCP/PA66) and LCP/poly(butyl terephthalate) (LCP/PBT) blends were compounded using a Brabender Plasticorder equipped with a mixing chamber. The LCP employed was a semi-flexible liquid crystalline copolyesteramide based on 30 mol% of p-amino benzoic acid (ABA) and 70 mol% of poly(ethylene terephthalate) (PET). The Flory-Huggins interaction parameters (χ12) of the LCP/PA66 and LCP/PBT blends are estimated by melting point depression from DSC measurement. The results indicate that χ12values all are negative for LCP/PA66 and LCP/PBT blends, and when the LCP content in these blends is more than 10 mass%, the absolute value of χ12decreases. Thereby, we can conclude that LCP/PA66 and LCP/PBT blends are fully miscible in the molten state, the molecular interaction between the LCP and PA66 is stronger than that between LCP and PBT. As the LCP content in LCP/PA66 and LCP/PBT blends is more than 10 mass%, the molecular interaction between LCP and matrix polymer decreases.
Original languageEnglish
Pages (from-to)541-548
Number of pages8
JournalJournal of Thermal Analysis and Calorimetry
Volume70
Issue number2
DOIs
Publication statusPublished - 1 Jan 2002

Keywords

  • Flory-Huggins interaction parameter
  • Miscibility
  • Poly(butyl terephthalate)
  • Polyamide 66
  • Semiflexible liquid crystalline copolyesteramide

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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