Korea-Australia Rheology Journal

The Korean Society of Rheology (한국유변학회)
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Rheological properties and thermal degradation behaviors of sonochemically treated polycarbonate/polysiloxanes blends

  • Choi, Mi-Kyung (Department of Chemical Engineering, Dankook University) ;
  • Kim, Yu-Bin (Department of Chemical Engineering, Dankook University) ;
  • Kim, Ji-Hye (Department of Chemical Engineering, Dankook University) ;
  • Kim, Hyung-Su (Department of Chemical Engineering, Dankook University)
  • Published : 2008.12.31
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Abstract

Two polysiloxanes having different chemical structures were blended with polycarbonate (PC) under ultrasonic irradiation in solution. The polysiloxanes used were poly(methylphenyl siloxane) and vinyl-terminated poly(dimethyl siloxane). It was of primary interest to investigate the effect of polysiloxane structure on the rheological properties of PC/polysiloxane blends. It was found that a small amount (1.5 phr) of polysiloxanes greatly altered the melt viscosities and elasticity of PC. In particular, incorporation of poly(methylphenylsiloxane) led to a notable increase in elasticity with greater shear sensitivity of PC. The observed rheological behaviors of PC/polysiloxane blends were partly explained in conjunction with the tendencies found in ultrasonic degradation of polysiloxanes. Thermal stability and morphology in sonicated blends of PC/polysiloxane blends were also discussed.

Keywords

References

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