THE EFFECTS OF LINEAR LOWDENSITY （线性LOWDENSITY的影响）.pdf

I.J.E.M.S., VOL.3(2) 2012: 85-90 ISSN 2229-600X THE EFFECTS OF LINEAR LOW-DENSITY POLYETHYLENE (LLDPE) ON THE MECHANICAL PROPERTIES OF HIGH-DENSITY POLYETHYLENE (HDPE) FILM BLENDS *Ogah, A. O. and Afiukwa J. N. Department of Industrial Chemistry, Ebonyi State University, Abakaliki, Private Mail Bag 053, Ebonyi State, Nigeria ABSTRACT Polyethylene is a synthetic polymer that has been explored for various applications, such as films and packaging materials. However, studies involving HDPE/LLDPE film blends has received limited attention. The effect of LLDPE on the mechanical properties of HDPE film blends was investigated. Films of HDPE/LLDPE blends were produced by extrusion moulding using a Co-rotatory Twin-screw Extruder. The blends were characterized using Capillary Rheometer, Elmendorf-Type Tear Tester, MLANO/ITALIA Dart-Impact Tester and ILAO TIEH Instron Tensile Testing Machine, Model 1026. Results showed that, the Melt-Flow-Index (MFI) and tear (tensile) strength increased with increasing amounts of LLDPE, but the impact strength, yield strength and secant modulus decreased significantly. KEYWORDS: Mechanical properties, Film blends, Extruder, Tensile strength, Dart impact. INTRODUCTION has enabled product specifications such as linearity, specific High density polyethylene (HDPE) is made by low pressure density and melt-flow index. The linearity in the polymer 4 methods. In this