Interrelationship between Interfacial Tension and Rheological Properties of LDPE/PS Blends

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概要

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• The relationships between the interfacial tension and rheological properties in LDPE/PS blend system have been investigated. The block copolymer SEBS has been used as a compatibilizer. The interfacial tension was measured by the breaking thread method. Its value of LDPE/PS was 5.52dyne/cm and it is decreased rapidly with SEBS contents to 1wt% and then level off to a saturation value of 3.1dyne/cm. From the oscillatory shear deformation test, G of the LDPE/PS blend increased with the LDPE contents at low frequencies due to the interfacial tension while G" showed similar behavior with that of pure LDPE and PS. The emulsion model considering the interfacial tension and droplet size in blends could predict the dynamic storage and loss modulus in reasonable range. Gramespacher and Meissners emulsion model was used in this study. When the SEBS 1wt% was added to the LDPE/PS blend as a compatiblizer, there was a slight drop of storage modulus at low frequency ranges. As the SEBS contents increased over 3wt%, however, there was a dramatic increase of storage modulus. It was because of the saturation of the interfacial and micelle formation. As the SEBS content increased, the droplet size of LDPE decreased and the amount of micelle increased at the LDPE/PS interface.

• 一般社団法人　日本レオロジー学会の論文
• 2002-09-15

著者

• Kim H.

  Department Of Advanced Materials Science The University Of Tokyo

• Lee J.

  Department Geosystem Engineering Kangwon National University

• Yang H.

  Department Of Physics Center For Nano Science And Nano Technology National Sun Yat-sen University

• Nam G.

  R&d Center For Chemical Technology Hyosung Corp.

• NAM G.

  R&D Center for Chemical Technology, Hyosung Corp.

• Kim H

  Department Of Chemical Engineering Dankook University

• Yang H.

  Department Of Chemical Engineering Sogang University

• Lee J.

  Department Of Chemical Engineering Sogang University

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