Thermal properties of blends of a thermotropic liquid crystalline copolyester of poly(hydroxy benzoic acid-co-ethylene terephthalate) and polyarylate

M. Han, J. Park, Woo Cheen Sun Woo Cheen, Sung Hyun Kim, Woo Nyon Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Thermal properties and transesterification reaction of blends of polyarylate (PAr) and a thermotropic liquid crystalline polymer (LCP) were investigated by differential scanning calorimetry (DSC) and Fourier Transform infrared (FT-IR) spectroscopy. In the thermogram of PAr-LCP blends, two glass transition temperatures (T(g)s) were observed. Phase behavior of the blends revealed that the LCP dissolved more in the PAr-rich phase than did the PAr in the LCP-rich phase, indicating partial miscibility between two polymers. The polymer-polymer interaction parameter (χ12) was calculated, and ranged from 0.069 to 0.076. In the calculation of the χ12, the anisotropy of the LCP was considered. After annealing, the two T(g)s of the blends were shifted toward the center. In the FT-IR spectroscopy study of the annealed PAr-LCP blends, three new characteristic peaks of the ester group were detected. The DSC and FT-IR results suggested that transesterification reaction between PAr and LCP occurred under the annealed condition.

Original languageEnglish
Pages (from-to)151-158
Number of pages8
JournalPolymer Bulletin
Volume45
Issue number2
DOIs
Publication statusPublished - 2000 Dec 21

Fingerprint

terephthalate
Benzoic Acid
Benzoic acid
Liquid crystal polymers
benzoic acid
Ethylene
ethylene
Thermodynamic properties
thermodynamic properties
Crystalline materials
polymers
Liquids
liquids
Polymers
Transesterification
Polymer blends
polymer blends
Fourier transform infrared spectroscopy
Differential scanning calorimetry
heat measurement

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Thermal properties of blends of a thermotropic liquid crystalline copolyester of poly(hydroxy benzoic acid-co-ethylene terephthalate) and polyarylate. / Han, M.; Park, J.; Sun Woo Cheen, Woo Cheen; Kim, Sung Hyun; Kim, Woo Nyon.

In: Polymer Bulletin, Vol. 45, No. 2, 21.12.2000, p. 151-158.

Research output: Contribution to journalArticle

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