Adsorption of Polymeric Additives Based on Vinyl Acetate Copolymers as Wax Dispersant and Its Relevance to Polymer Crystallization Mechanisms

Adsorption of Polymeric Additives Based on Vinyl Acetate Copolymers as Wax Dispersant and Its Relevance to Polymer Crystallization Mechanisms

The present work has main target to study the effect of additives molecular weight and composition on the flow characteristics of wax crude oil at low temperature below pour point temperature. In this respect, maleic anhydride ester-co-vinyl acetate copolymers with varied monomers feed ratios and di...

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Main Authors: Ayman M. Atta, Rasha A. El-Ghazawy, Fatma A. Morsy, Ali M. S. Hebishy, Abdullah Elmorsy
Format: Article
Language:English
Published: Hindawi Limited 2015-01-01
Series:Journal of Chemistry
Online Access:http://dx.doi.org/10.1155/2015/683109
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spelling doaj-d62354f7844541a49c463d062faa13bf2020-11-24T23:46:55ZengHindawi LimitedJournal of Chemistry2090-90632090-90712015-01-01201510.1155/2015/683109683109Adsorption of Polymeric Additives Based on Vinyl Acetate Copolymers as Wax Dispersant and Its Relevance to Polymer Crystallization MechanismsAyman M. Atta0Rasha A. El-Ghazawy1Fatma A. Morsy2Ali M. S. Hebishy3Abdullah Elmorsy4Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaPetroleum Application Department, Egyptian Petroleum Research Institute, Nasr City, Cairo, EgyptChemistry Department, Faculty of Science, Helwan University, Helwan, EgyptChemistry Department, Faculty of Science, Helwan University, Helwan, EgyptChemistry Department, Faculty of Science, Helwan University, Helwan, EgyptThe present work has main target to study the effect of additives molecular weight and composition on the flow characteristics of wax crude oil at low temperature below pour point temperature. In this respect, maleic anhydride ester-co-vinyl acetate copolymers with varied monomers feed ratios and different alkyl ester lengths, namely, dodecyl, stearyl, and behenyl alkyl chains, were prepared. These polymeric materials were characterized by FTIR, 1HNMR, and GPC. The performance of these additives as pour point depressants and flow improver for Egyptian waxy crude oil was evaluated through measurements of pour point and rheological parameters (viscosity and yield stress). It was observed that stearyl maleate-vinyl acetate copolymer with 1 : 2 feed ratio shows the best efficiency as pour point depressant even at low concentration while octadecyl maleate-vinyl acetate copolymers with 2 : 1 feed ratio are effective as flow improver.http://dx.doi.org/10.1155/2015/683109
collection DOAJ
language English
format Article
sources DOAJ
author Ayman M. Atta
Rasha A. El-Ghazawy
Fatma A. Morsy
Ali M. S. Hebishy
Abdullah Elmorsy
spellingShingle Ayman M. Atta
Rasha A. El-Ghazawy
Fatma A. Morsy
Ali M. S. Hebishy
Abdullah Elmorsy
Adsorption of Polymeric Additives Based on Vinyl Acetate Copolymers as Wax Dispersant and Its Relevance to Polymer Crystallization Mechanisms
Journal of Chemistry
author_facet Ayman M. Atta
Rasha A. El-Ghazawy
Fatma A. Morsy
Ali M. S. Hebishy
Abdullah Elmorsy
author_sort Ayman M. Atta
title Adsorption of Polymeric Additives Based on Vinyl Acetate Copolymers as Wax Dispersant and Its Relevance to Polymer Crystallization Mechanisms
title_short Adsorption of Polymeric Additives Based on Vinyl Acetate Copolymers as Wax Dispersant and Its Relevance to Polymer Crystallization Mechanisms
title_full Adsorption of Polymeric Additives Based on Vinyl Acetate Copolymers as Wax Dispersant and Its Relevance to Polymer Crystallization Mechanisms
title_fullStr Adsorption of Polymeric Additives Based on Vinyl Acetate Copolymers as Wax Dispersant and Its Relevance to Polymer Crystallization Mechanisms
title_full_unstemmed Adsorption of Polymeric Additives Based on Vinyl Acetate Copolymers as Wax Dispersant and Its Relevance to Polymer Crystallization Mechanisms
title_sort adsorption of polymeric additives based on vinyl acetate copolymers as wax dispersant and its relevance to polymer crystallization mechanisms
publisher Hindawi Limited
series Journal of Chemistry
issn 2090-9063
2090-9071
publishDate 2015-01-01
description The present work has main target to study the effect of additives molecular weight and composition on the flow characteristics of wax crude oil at low temperature below pour point temperature. In this respect, maleic anhydride ester-co-vinyl acetate copolymers with varied monomers feed ratios and different alkyl ester lengths, namely, dodecyl, stearyl, and behenyl alkyl chains, were prepared. These polymeric materials were characterized by FTIR, 1HNMR, and GPC. The performance of these additives as pour point depressants and flow improver for Egyptian waxy crude oil was evaluated through measurements of pour point and rheological parameters (viscosity and yield stress). It was observed that stearyl maleate-vinyl acetate copolymer with 1 : 2 feed ratio shows the best efficiency as pour point depressant even at low concentration while octadecyl maleate-vinyl acetate copolymers with 2 : 1 feed ratio are effective as flow improver.
url http://dx.doi.org/10.1155/2015/683109
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