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Mr. Ahmad Nalbandi

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Mr. Ahmad Nalbandi
Journal of Petroleum
Science and Technology

An Investigation into the Physical Properties of Polyethylene Gas
Pipes by the Incorporation of Anti-rodent Masterbatches
Ahmad Nalbandi*and Homayon Hossein Khanli

Abstract

The incorporation of several anti-rodent masterbatches into polyethylene (PE) granules used for gas pipes and the effects of the masterbatches on the physical properties of the pipes were studied. Four commercial anti-rodent masterbatches from different international companies including, Clariant, Alchemix, PolyOne, and Newgen were used in this research. Each of the masterbatch was primarily dry-blended with PE granules by a laboratory-scale tumbling mixer. The concentration of anti-rodent masterbatches used in the PE blends was fixed according to the recipe recommended by the producers as 1, 2.5, 3, and 4 phr for the masterbatches of Clarian, Alchemix,
PolyOne, and Newgen respectively. PE granules and masterbatch blends were separately fed into the hopper of a pipe extruder and a length of a hundred and fifty meters of the pipe with the outside diameter (O.D.) of 25 millimeters was continuously produced for each anti-rodent-added
PE compound. Two groups of experiments were planned for this investigation; laboratory experiments including impact resistance, tensile elongation, environmental stress cracking (ESCR), melt flow rate (MFR), and differential scanning calorimetry (DSC) were carried out on the control
(anti-rodent free) and anti-rodent-added PE100 test samples prepared in the laboratory. Also, a group of factory tests such as burst, hydrostatic (100, 165, and 1000 hr), slow crack growth (SCG), and oxygen induction time (OIT) were performed on the control and anti-rodent-added pipe samples. Keywords: Anti-rodent Materials, Polyethylene Pipes, Rodent Attacks, Melt Blending

Introduction

viewpoints, it is not wise to wait and see the plastic objects fail, and then just replace them with new ones. It is practiced



References: Lifetime can be predicted”. 2001, Proceedings of Plastics Pipes XI, IOM Received: May 1, 2012 Received in revised form: September12, 2012 Accepted: October8, 2012 Available online: October12, 2012

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