Study on Viscosity and Extrusion Pressure .scillation of PE-I}D/EVA Blends

doi:10.19491/j.issn.1001-9278.2008.04.013

China Plastics ›› 2008, Vol. 22 ›› Issue (04): 57-61 .DOI: 10.19491/j.issn.1001-9278.2008.04.013

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Study on Viscosity and Extrusion Pressure .scillation of PE-I}D/EVA Blends

YANG Jun-hong，LIU Yue-jun，LI Xiang-gang，TAN Hui

The Key Lab of New Material and Technology for Package, Hunan University of Technology, Zhuzhou 412007, China

Received:2007-11-29 Revised:1900-01-01 Online:2008-04-26 Published:2008-04-26

Abstract

Abstract: The rheological property for blends of high density polyethylene (PE-HD) and ethylene/vinyl acetate copolymer (EVA) were studied using a double capillary rheometer of constant speed type. the major attention was paid to the effects of EVA contents on the viscosity and the extrusion pressure oscillation. At low shear rate, the viscosity of the blend was sensitive to EVA contents, and exhibited almost a linearly decrease with increasing content of EVA. By blending PE-HD with EVA, the extrusion pressure oscillation can be suppressed; the critical shear rate was increased and the amplitude of pressure oscillation was reduced.

Key words: high density polyethylene, ethylene/vinyl acetate copolymer, blending, extrusion pressure oscillation, viscosity

YANG Jun-hong, LIU Yue-jun, LI Xiang-gang, TAN Hui. Study on Viscosity and Extrusion Pressure .scillation of PE-I}D/EVA Blends[J]. China Plastics, 2008, 22(04): 57-61 .

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Study on Viscosity and Extrusion Pressure .scillation of PE-I}D/EVA Blends

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