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Production and application properties of dispersive viscosity index improvers / Ivana Soljic Jerbic in Industrial & engineering chemistry research, Vol. 51 N° 37 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 37 (Septembre 2012) . - pp. 11914–11923 Titre : Production and application properties of dispersive viscosity index improvers Type de document : texte imprimé Auteurs : Ivana Soljic Jerbic, Auteur ; Jelena Parlov Vukovic, Auteur ; Ante Jukic, Auteur Année de publication : 2012 Article en page(s) : pp. 11914–11923 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Dispersive  viscosity Résumé : Polymeric dispersive viscosity index improvers of lubricating mineral oils based on styrene, dodecyl-methacrylate, octadecyl methacrylate, and N,N-dimethylaminoethyl methacrylate (d-PSAMA) were produced by performing copolymerizations isothermally up to the high conversion in mineral base oil solution, using monofunctional or bifunctional peroxide initiator. The obtained kinetics results reveal the benefits of the usage of a bifunctional peroxide initiator over a monofunctional, because complete conversion of monomers was accomplished in the shorter reaction time, performing the process in a full batchwise mode. When the bifunctional initiator was applied, the required polymerization temperature was slightly higher (105 °C), and copolymers of higher average molecular weight values (Mw = 60–120 kg mol–1) were obtained, while in case of the monofunctional peroxide initiator, the reaction temperature was 100 °C, and average molecular weight values of copolymers were Mw = 30–100 kg/mol. Investigated application properties demonstrated that d-PSAMA additives were fully comparable with conventional pure methacrylate additives, and also it provided other advantages such as higher viscosity index and kinematic viscosity, lower values of pour point temperatures, as well as better dispersant and detergent properties. Thus, by increasing the N,N-dimethylaminoethyl methacrylate share in copolymers from 2 to 10 mol %, their weight average molecular weight decreased from 120 to 60 kg mol–1, while kinematic viscosity values at 100 °C remain high and amounted to 14.5 ± 0.5 mm2 s–1. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301010n [article] Production and application properties of dispersive viscosity index improvers [texte imprimé] / Ivana Soljic Jerbic, Auteur ; Jelena Parlov Vukovic, Auteur ; Ante Jukic, Auteur . - 2012 . - pp. 11914–11923. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 37 (Septembre 2012) . - pp. 11914–11923 Mots-clés : Dispersive  viscosity Résumé : Polymeric dispersive viscosity index improvers of lubricating mineral oils based on styrene, dodecyl-methacrylate, octadecyl methacrylate, and N,N-dimethylaminoethyl methacrylate (d-PSAMA) were produced by performing copolymerizations isothermally up to the high conversion in mineral base oil solution, using monofunctional or bifunctional peroxide initiator. The obtained kinetics results reveal the benefits of the usage of a bifunctional peroxide initiator over a monofunctional, because complete conversion of monomers was accomplished in the shorter reaction time, performing the process in a full batchwise mode. When the bifunctional initiator was applied, the required polymerization temperature was slightly higher (105 °C), and copolymers of higher average molecular weight values (Mw = 60–120 kg mol–1) were obtained, while in case of the monofunctional peroxide initiator, the reaction temperature was 100 °C, and average molecular weight values of copolymers were Mw = 30–100 kg/mol. Investigated application properties demonstrated that d-PSAMA additives were fully comparable with conventional pure methacrylate additives, and also it provided other advantages such as higher viscosity index and kinematic viscosity, lower values of pour point temperatures, as well as better dispersant and detergent properties. Thus, by increasing the N,N-dimethylaminoethyl methacrylate share in copolymers from 2 to 10 mol %, their weight average molecular weight decreased from 120 to 60 kg mol–1, while kinematic viscosity values at 100 °C remain high and amounted to 14.5 ± 0.5 mm2 s–1. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301010n