Korea-Australia Rheology Journal

The Korean Society of Rheology (한국유변학회)
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Morphology and mechanical properties of LDPE/PS blends prepared by ultrasound-assisted melt mixing

  • Ryu, Joung Gul (Applied Rheology Center, Department of Chemical Engineering Sogang University) ;
  • Kim, Hyungsu (Applied Rheology Center, Department of Chemical Engineering, Dankook University) ;
  • Kim, Myung Ho (LG Chemical Ltd.) ;
  • Lee, Jae Wook (Applied Rheology Center, Department of Chemical Engineering Sogang University)
  • Published : 2004.09.01
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Abstract

Ultrasound-assisted melt mixing was applied to blending polystyrene (PS) and low density polyethylene(LDPE). The influence of the ultrasonic irradiation on the morphology and mechanical properties of the blends was investigated. It was observed that the domain sizes of the blend were significantly reduced and phase stability was well sustained even after a thermal treatment. Such morphological feature was consistent with the improvements in mechanical performance of the blends. The desirable results of ultrasonic compatibilization are mainly attributed to the in-situ formation of PS-LDPE copolymers as confirmed by a proper separation experiment. An important relationship between ultrasonic irradiation time and mechanical properties is revealed and an issue on the thermal stability of the blend is discussed.

Keywords

References

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