Effect of Charge Distribution on the Viscosity and Viscoelastic Properties of Partially Hydrolyzed Polyacrylamide

Autor:	Kristine Spildo, Endre I. Ø. Sæ
Rok vydání:	2015
Předmět:	chemistry.chemical_classification General Chemical Engineering Polyacrylamide Energy Engineering and Power Technology Polymer Viscoelasticity chemistry.chemical_compound Hydrolysis Viscosity Fuel Technology chemistry Chemical engineering Acrylamide Polymer chemistry Copolymer Enhanced oil recovery
Zdroj:	Energy & Fuels. 29:5609-5617
ISSN:	1520-5029 0887-0624
DOI:	10.1021/acs.energyfuels.5b01066
Popis:	The majority of the polymers used in enhanced oil recovery (EOR) processes are water-soluble, acrylamide-based polymers, typically partially hydrolyzed polyacrylamide (HPAM). Industrial-scale production of HPAM polymers for EOR involves either posthydrolysis of polyacrylamide or copolymerization of acrylamide and sodium acrylate. Although products with the same molecular weight and average degree of hydrolysis can be made, the two processes give rise to products with different distributions of charge between individual polymer molecules. In this work, we show that charge distribution at constant molecular weight and average degree of hydrolysis has a significant effect on HPAM viscosity and viscoelasticity of calcium-containing brines. In EOR processes, viscosity and viscoelastic properties are key performance parameters, and calcium ions are an inherent part of most formation and injection waters. Thus, knowledge of the average degree of hydrolysis is not sufficient for performance prediction. To our kno...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cdbc9462b3ac25039ea333f4d520b0fe https://doi.org/10.1021/acs.energyfuels.5b01066 Zobrazit plný text záznamu