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Article
Study of Intrinsic Viscosity and Flow Activation Energy of Some Polymers in Different Solvents

Author: Talib B. Kashmoula
Journal: AL-NAHRAIN JOURNAL FOR ENGINEERING SCIENCES مجلة النهرين للعلوم الهندسية ISSN: 25219154 / eISSN 25219162 Year: 2013 Volume: 16 Issue: 1 Pages: 30 -40
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

The intrinsic viscosity has been studied forseveral polymers which are used in someindustrial applications, such as polyisobutylene oftypes Oppanol B150, 200, and 250 with differentmolecular weights of 2.5, 4.1 and 5.9 milliong/mole, respectively, which dissolved in crudeand gas oil. In addition three types of additivesbrought from Al-Dura refinery, olefin copolymer(OCP), {viscoples-4-677, viscoplex-215496, andLubrizol R 7077} which dissolved in crude oil,and the polymers which is soluble in water suchas polyacrylamide with high molecular weightand xanthan gum with molecular weight 3.7million g/mole where also studied. It was foundthat the intrinsic viscosity of polyisobutylenedecrease as the temperature increase in crude andgas oil. The olefin copolymer (Viscoplex-4-677)showed the same behavior as polyisobutylenewhere it can be used as drag reduction agent. Itwas noted that neutral polymers as well aspolyelectrolytes could be used as drag reductionagent.


Article
Vapor-Liquid-Liquid Equilibrium (VLLE) Data for the Systems Ethyl acetate + Water, Toluene + Water and Toluene + Ethyl acetate + Water at 101.3 kPa. Using Modified Equilibrium Still

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Abstract

Isobaric Vapor-Liquid-Liquid equilibrium data for the binary systems ethyl acetate + water, toluene + water and the ternary system toluene + ethyl acetate + water were determined by a modified equilibrium still, the still consisted of a boiling and a condensation sections supplied with mixers that helped to correct the composition of the recycled condensed liquid and the boiling temperature readings in the condensation and boiling sections respectively. The VLLE data where predicted and correlated using the Peng-Robinson Equation of State in the vapor phase and one of the activity coefficient models Wilson, NRTL, UNIQUAC and the UNIFAC in the liquid phase and also were correlated using the Peng-Robinson Equation of State in both the vapor and liquid phases.

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