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In the present study, blown films of h-LLDPE, LDPE, and their blends were produced using a twin screw extruder. The tear properties of all films were determined in the machine direction (MD) and the transverse direction (TD). On one hand, similar values of the MD tear-resistance for the two virgin polymers, h-LLDPE and LDPE, were measured to be 100 and 120 kN/m, respectively. On the other hand, the TD tear-resistance value of h-LLDPE was 180 kN/m, four times higher than that of LDPE, 45 kN/m. It was observed that small additions of LDPE (5 to 20 wt.%) to h-LLDPE produced blends with better TD tear-resistance films, 400 kN/m. The main reason for this large increase in tear-resistance was attributed to the morphological changes induced by the addition of the LDPE polymer, as shown by SEM, FTIR, and birefringence techniques.
From K. Mezghani 1 | S. Furquan 1 | S. H. Tabatabaei 2 | A. Ajji 2
1Mechanical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
2Chemical Engineering Department, Ecole Polytechnique de Montreal, Montréal, QC, Canada
2Chemical Engineering Department, Ecole Polytechnique de Montreal, Montréal, QC, Canada
(Received 13.10.2011; accepted 02.01.2012)
Appeared in International Polymer Processing 2012/03, Page 392-398
DOI: 10.3139/217.2575
Direct link: http://www.polymer-process.com/IPP2575
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Effect of Blend Ratio of h-LLDPE and LDPE on Tear Properties of Blown Films [395 KB]
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