Properties of blends of polycarbonate and a thermotropic liquid crystalline polymer

H. S. Lee, W. H. Jung, Hyun Wook Jung, Woo Nyon Kim, J. C. Hyun

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Thermal properties, morphology, and Theological 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), scanning electron microscopy (SEM), polarized optical microscopy, and rotational rheometry. From the measured glass transition temperature (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 were investigated using lattice theory in which the anisotropy of LCP was considered. The polymer-polymer interaction parameter (#12) were determined and found to be 0.068 for the extruded blends of PC-LCP (5 : 5) at 523 K. Significant depression of the viscosity is observed in the PC-rich blends and this is mainly due to the fibrous structure of the LCP in the blends. The storage modulus of the PC-rich compositions exceeds that of the matrix component at low frequencies and this result may be due to the increase of elasticity of the blends.

Original languageEnglish
Pages (from-to)813-822
Number of pages10
JournalPolymer (Korea)
Volume20
Issue number5
Publication statusPublished - 1996 Dec 1

Fingerprint

polycarbonate
Liquid crystal polymers
Polycarbonates
Polymers
Lattice theory
Calorimeters
Optical microscopy
Extrusion

Keywords

  • Blend
  • Liquid crystalline polymer
  • Morphology
  • Polycarbonate
  • Rheology

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Properties of blends of polycarbonate and a thermotropic liquid crystalline polymer. / Lee, H. S.; Jung, W. H.; Jung, Hyun Wook; Kim, Woo Nyon; Hyun, J. C.

In: Polymer (Korea), Vol. 20, No. 5, 01.12.1996, p. 813-822.

Research output: Contribution to journalArticle

@article{312253584d1e41d180d78d137a360a16,
title = "Properties of blends of polycarbonate and a thermotropic liquid crystalline polymer",
abstract = "Thermal properties, morphology, and Theological 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), scanning electron microscopy (SEM), polarized optical microscopy, and rotational rheometry. From the measured glass transition temperature (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 were investigated using lattice theory in which the anisotropy of LCP was considered. The polymer-polymer interaction parameter (#12) were determined and found to be 0.068 for the extruded blends of PC-LCP (5 : 5) at 523 K. Significant depression of the viscosity is observed in the PC-rich blends and this is mainly due to the fibrous structure of the LCP in the blends. The storage modulus of the PC-rich compositions exceeds that of the matrix component at low frequencies and this result may be due to the increase of elasticity of the blends.",
keywords = "Blend, Liquid crystalline polymer, Morphology, Polycarbonate, Rheology",
author = "Lee, {H. S.} and Jung, {W. H.} and Jung, {Hyun Wook} and Kim, {Woo Nyon} and Hyun, {J. C.}",
year = "1996",
month = "12",
day = "1",
language = "English",
volume = "20",
pages = "813--822",
journal = "Polymer (Korea)",
issn = "0379-153X",
publisher = "Polymer Society of Korea",
number = "5",

}

TY - JOUR

T1 - Properties of blends of polycarbonate and a thermotropic liquid crystalline polymer

AU - Lee, H. S.

AU - Jung, W. H.

AU - Jung, Hyun Wook

AU - Kim, Woo Nyon

AU - Hyun, J. C.

PY - 1996/12/1

Y1 - 1996/12/1

N2 - Thermal properties, morphology, and Theological 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), scanning electron microscopy (SEM), polarized optical microscopy, and rotational rheometry. From the measured glass transition temperature (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 were investigated using lattice theory in which the anisotropy of LCP was considered. The polymer-polymer interaction parameter (#12) were determined and found to be 0.068 for the extruded blends of PC-LCP (5 : 5) at 523 K. Significant depression of the viscosity is observed in the PC-rich blends and this is mainly due to the fibrous structure of the LCP in the blends. The storage modulus of the PC-rich compositions exceeds that of the matrix component at low frequencies and this result may be due to the increase of elasticity of the blends.

AB - Thermal properties, morphology, and Theological 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), scanning electron microscopy (SEM), polarized optical microscopy, and rotational rheometry. From the measured glass transition temperature (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 were investigated using lattice theory in which the anisotropy of LCP was considered. The polymer-polymer interaction parameter (#12) were determined and found to be 0.068 for the extruded blends of PC-LCP (5 : 5) at 523 K. Significant depression of the viscosity is observed in the PC-rich blends and this is mainly due to the fibrous structure of the LCP in the blends. The storage modulus of the PC-rich compositions exceeds that of the matrix component at low frequencies and this result may be due to the increase of elasticity of the blends.

KW - Blend

KW - Liquid crystalline polymer

KW - Morphology

KW - Polycarbonate

KW - Rheology

UR - http://www.scopus.com/inward/record.url?scp=21444443124&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=21444443124&partnerID=8YFLogxK

M3 - Article

VL - 20

SP - 813

EP - 822

JO - Polymer (Korea)

JF - Polymer (Korea)

SN - 0379-153X

IS - 5

ER -