Thermal behavior and the determination of the polymer-polymer interaction parameter of polycarbonate and a thermotropic liquid crystalline polymer blends

Heon Sang Lee; Won Ho Jung; Woo Nyon Kim

doi:10.1007/BF00556812

Thermal behavior and the determination of the polymer-polymer interaction parameter of polycarbonate and a thermotropic liquid crystalline polymer blends

Heon Sang Lee, Won Ho Jung, Woo Nyon Kim

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Thermal properties of the blends of polycarbonate (PC) and a thermotropic liquid crystalline polymer (LCP) prepared by screw extrusion have been investigated by differential scanning calorimeter (DSC). From the measured glass transition temperature (T_g) and specific heat increment (ΔC_p) at the T_g, the LCP appears to dissolve more in the PC-rich phase than does the PC in the LCP-rich phase. The polymer-polymer interaction parameter (χ₁₂) and the degree of disorder (y/x₁) of LCP in the PC-LCP blends were investigated using the lattice theory in which the anisotropy of LCP was taken into consideration. The χ₁₂ of PC-LCP blend was calculated from the measured T_g and found to be 0.076±0.008 at 250 °C. The y/x₁ of LCP in amorphous phase was found to be increased with the increase of PC weight fraction in the PC-LCP blends.

Original language	English
Pages (from-to)	503-510
Number of pages	8
Journal	Polymer Bulletin
Volume	37
Issue number	4
DOIs	https://doi.org/10.1007/BF00556812
Publication status	Published - 1996 Oct

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Polymers and Plastics
Materials Chemistry

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10.1007/BF00556812

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abstract = "Thermal properties of the blends of polycarbonate (PC) and a thermotropic liquid crystalline polymer (LCP) prepared by screw extrusion have been investigated by differential scanning calorimeter (DSC). From the measured glass transition temperature (Tg) and specific heat increment (ΔCp) at the Tg, the LCP appears to dissolve more in the PC-rich phase than does the PC in the LCP-rich phase. The polymer-polymer interaction parameter (χ12) and the degree of disorder (y/x1) of LCP in the PC-LCP blends were investigated using the lattice theory in which the anisotropy of LCP was taken into consideration. The χ12 of PC-LCP blend was calculated from the measured Tg and found to be 0.076±0.008 at 250 °C. The y/x1 of LCP in amorphous phase was found to be increased with the increase of PC weight fraction in the PC-LCP blends.",

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AU - Lee, Heon Sang

AU - Jung, Won Ho

AU - Kim, Woo Nyon

PY - 1996/10

Y1 - 1996/10

N2 - Thermal properties of the blends of polycarbonate (PC) and a thermotropic liquid crystalline polymer (LCP) prepared by screw extrusion have been investigated by differential scanning calorimeter (DSC). From the measured glass transition temperature (Tg) and specific heat increment (ΔCp) at the Tg, the LCP appears to dissolve more in the PC-rich phase than does the PC in the LCP-rich phase. The polymer-polymer interaction parameter (χ12) and the degree of disorder (y/x1) of LCP in the PC-LCP blends were investigated using the lattice theory in which the anisotropy of LCP was taken into consideration. The χ12 of PC-LCP blend was calculated from the measured Tg and found to be 0.076±0.008 at 250 °C. The y/x1 of LCP in amorphous phase was found to be increased with the increase of PC weight fraction in the PC-LCP blends.

AB - Thermal properties of the blends of polycarbonate (PC) and a thermotropic liquid crystalline polymer (LCP) prepared by screw extrusion have been investigated by differential scanning calorimeter (DSC). From the measured glass transition temperature (Tg) and specific heat increment (ΔCp) at the Tg, the LCP appears to dissolve more in the PC-rich phase than does the PC in the LCP-rich phase. The polymer-polymer interaction parameter (χ12) and the degree of disorder (y/x1) of LCP in the PC-LCP blends were investigated using the lattice theory in which the anisotropy of LCP was taken into consideration. The χ12 of PC-LCP blend was calculated from the measured Tg and found to be 0.076±0.008 at 250 °C. The y/x1 of LCP in amorphous phase was found to be increased with the increase of PC weight fraction in the PC-LCP blends.

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Thermal behavior and the determination of the polymer-polymer interaction parameter of polycarbonate and a thermotropic liquid crystalline polymer blends

Abstract

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