화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korea-Australia Rheology Journal, Vol.16, No.3, 147-152, September, 2004
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Morphology and mechanical properties of LDPE/PS blends prepared by ultrasound-assisted melt mixing
Joung Gul Ryu, Hyungsu Kim1, Myung Ho Kim2, and Jae Wook Lee†
  • Applied Rheology Center, Department of Chemical Engineering, Sogang University, 1 Shinsu-Dong, Mapo-Gu, Seoul 121-742, Korea
  • 1Applied Rheology Center, Department of Chemical Engineering, Dankook University, 147 Hannam Ro, Hannam-Dong, Yongsan-Gu, Seoul 140-714, Korea
  • 2LG Chemical Ltd./Research Park, Science Town, Yusung, Korea
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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:LDPE;PS;polymer blend;power ultrasound;in-situ compatibilization
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