{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T13:11:23Z","timestamp":1788527483778,"version":"build-2803163510"},"reference-count":44,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2021,3,3]],"date-time":"2021-03-03T00:00:00Z","timestamp":1614729600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Task-specific ionic liquids (TSILs) are ionic liquids with structures and, consequently, properties and behaviors designed for particular applications. In this work, task-specific ILs with alkylammonium or benzalkonium cations and carboxyl groups in the form of lactate anions were used to promote the homogeneous dispersion of the curatives in the elastomer matrix. The reaction of carboxyl groups of TSILs with zinc oxide, which acts as a vulcanization activator, was confirmed. This interaction improved the solubility and dispersibility of zinc oxide particles in the ethylene-propylene-diene (EPDM) monomer matrix, which consequently affected the curing characteristics of rubber compounds. Most importantly, TSILs increased the efficiency of vulcanization by shortening the time, lowering the temperature and increasing the enthalpy of this process, while maintaining safe processing of elastomer composites. EPDM vulcanizates containing TSILs with lactate anion were characterized by satisfactory functional properties.<\/jats:p>","DOI":"10.3390\/polym13050774","type":"journal-article","created":{"date-parts":[[2021,3,3]],"date-time":"2021-03-03T20:33:57Z","timestamp":1614803637000},"page":"774","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Task-Specific Ionic Liquids with Lactate Anion Applied to Improve ZnO Dispersibility in the Ethylene-Propylene-Diene Elastomer"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0963-9973","authenticated-orcid":false,"given":"Anna","family":"Sowi\u0144ska","sequence":"first","affiliation":[{"name":"Institute of Polymer and Dye Technology, Lodz University of Technology, Stefanowskiego Street 12\/16, 90-924 Lodz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7110-290X","authenticated-orcid":false,"given":"Magdalena","family":"Maciejewska","sequence":"additional","affiliation":[{"name":"Institute of Polymer and Dye Technology, Lodz University of Technology, Stefanowskiego Street 12\/16, 90-924 Lodz, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laina","family":"Guo","sequence":"additional","affiliation":[{"name":"Hutchinson S.A-Research &amp; Innovation Center, Rue Gustave Nourry BP31, 45120 Ch\u00e2lette sur Loing, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2183-8115","authenticated-orcid":false,"given":"Etienne","family":"Delebecq","sequence":"additional","affiliation":[{"name":"Hutchinson S.A-Research &amp; Innovation Center, Rue Gustave Nourry BP31, 45120 Ch\u00e2lette sur Loing, France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,3,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Wasserscheid, P., and Welton, T. (2008). Ionic Liquids in Synthesis, Wiley-VCH. [2nd ed.].","DOI":"10.1002\/9783527621194"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"792","DOI":"10.1126\/science.1090313","article-title":"Ionic Liquids\u2014Solvents of the Future?","volume":"302","author":"Rogers","year":"2003","journal-title":"Science"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1016\/S0040-6031(00)00373-7","article-title":"Thermal properties of imidazolium ionic liquids","volume":"357\u2013358","author":"Ngo","year":"2000","journal-title":"Thermochim. Acta"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"221","DOI":"10.1016\/S0022-1139(99)00267-5","article-title":"Room temperature ionic liquids of alkylimidazolium cations and fluoroanions","volume":"105","author":"Hagiwara","year":"2000","journal-title":"J. Fluorine. Chem."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"4675","DOI":"10.1002\/pola.20971","article-title":"Ionic liquids in the synthesis and modification of polymers","volume":"43","author":"Kubisa","year":"2005","journal-title":"J. Polym. Sci. Part A Polym. Chem."},{"key":"ref_6","first-page":"223","article-title":"Ionic liquids","volume":"1","author":"Holbrey","year":"1999","journal-title":"Clean Products Process."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"6115","DOI":"10.1039\/C6GC01677D","article-title":"Tailor-made thermoreversible functional polymer via RAFT polymerization in an ionic liquid: A remarkably fast polymerization process","volume":"18","author":"Singha","year":"2016","journal-title":"Green Chem."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1368","DOI":"10.1039\/b204319j","article-title":"Conventional free radical polymerization in room temperature ionic liquids: A green approach to commodity polymers with practical advantages","volume":"13","author":"Hong","year":"2002","journal-title":"Chem. Commun."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"4059","DOI":"10.1039\/C5PY00423C","article-title":"Polymerization in ionic liquid-based microemulsions","volume":"6","author":"Yuan","year":"2015","journal-title":"Polym. Chem."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"700","DOI":"10.1039\/b315100j","article-title":"Living cationic polymerisation of styrene in an ionic liquid","volume":"6","author":"Vijayaraghavan","year":"2004","journal-title":"Chem. Commun."},{"key":"ref_11","first-page":"3379","article-title":"ATRP of Methyl Methacrylate in the Presence of Ionic Liquids with Ferrous and Cuprous Anions","volume":"202","author":"Sarbu","year":"2001","journal-title":"Chem. Phys."},{"key":"ref_12","first-page":"405","article-title":"Molecular weights and electrical conductivity of several fused salts","volume":"8","author":"Walden","year":"1914","journal-title":"Bull. Acad. Imper. Sci."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"73","DOI":"10.1039\/b110838g","article-title":"A short history of ionic liquids\u2014from molten salts to neoteric solvents","volume":"4","author":"Wilkes","year":"2002","journal-title":"Green Chem."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1016\/j.molcata.2003.11.029","article-title":"Properties of ionic liquid solvents for catalysis","volume":"214","author":"Wilkes","year":"2004","journal-title":"J. Mol. Catal. A"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"275","DOI":"10.1002\/poc.863","article-title":"Ionic liquids: Solvent properties and organic reactivity","volume":"18","author":"Chippe","year":"2005","journal-title":"J. Phys. Org. Chem."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"2122","DOI":"10.1002\/chem.200500581","article-title":"From dysfunction to bis-function: On the design and applications of functionalised ionic liquids","volume":"12","author":"Fei","year":"2006","journal-title":"J. Chem. Eur. J."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Handy, S. (2011). Theoretical Description of Ionic Liquids. Ionic Liquids\u2014Classes and Properties, InTechOpen.","DOI":"10.5772\/853"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Handy, S. (2011). 1,2,3-Triazolium Salts as a Versatile New Class of Ionic Liquids. Ionic Liquids\u2014Classes and Properties, InTechOpen.","DOI":"10.5772\/853"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"592","DOI":"10.1039\/B919044A","article-title":"Facile EG\/ionic liquid interfacial synthesis of uniform RE3+ doped NaYF4 nanocubes","volume":"46","author":"Zhang","year":"2010","journal-title":"Chem. Commun."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"4886","DOI":"10.1002\/chem.200400145","article-title":"Br\u00f8nsted Acidic Ionic Liquids and Their Zwitterions: Synthesis, Characterization and pKa Determination","volume":"10","author":"Fei","year":"2004","journal-title":"Chem. Eur. J."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"1838","DOI":"10.1007\/s10562-011-0682-3","article-title":"Br\u00f8nsted Acidic Ionic Liquids Mediated Metallic Salts Catalytic System for the Chemical Fixation of Carbon Dioxide to Form Cyclic Carbonates","volume":"141","author":"Xiao","year":"2011","journal-title":"Catal. Lett."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"20978","DOI":"10.1021\/jp0642995","article-title":"Task-specific ionic liquid for solubilizing metal oxides","volume":"110","author":"Nockeman","year":"2006","journal-title":"J. Phys. Chem. B."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1449","DOI":"10.1002\/chem.200801418","article-title":"Speciation of rare-earth metal complexes in ionic liquids: A multiple-technique approach","volume":"15","author":"Nockemann","year":"2009","journal-title":"Chem. Eur. J."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"514","DOI":"10.5254\/1.3547834","article-title":"Activators in Accelerated Sulfur Vulcanization","volume":"77","author":"Heideman","year":"2004","journal-title":"Rubber Chem. Technol."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1329","DOI":"10.5254\/1.3539199","article-title":"The Chemistry of Sulfur Curing. III. Effects of Zinc Oxide on the Mechanism of the Reaction of Cyclohexene with Sulfur","volume":"41","author":"Wolfe","year":"1968","journal-title":"Rubber Chem. Technol."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"376","DOI":"10.5254\/1.3538317","article-title":"A Review of Sulfur Crosslinking Fundamentals for Accelerated and Unaccelerated Vulcanization","volume":"66","author":"Kresja","year":"1993","journal-title":"Rubber Chem. Technol."},{"key":"ref_27","unstructured":"Mark, J., Erman, B., and Eirich, F. (1978). Vulcanization of Rubber. Science & Technology of Rubber, Academic Press. [2nd ed.]."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"100","DOI":"10.5254\/1.3539039","article-title":"Structural Characterization of Sulfur-Vulcanized Rubber Networks","volume":"40","author":"Saville","year":"1967","journal-title":"Rubber Chem. Technol."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1311","DOI":"10.5254\/1.3547331","article-title":"Sulfenamide Accelerated Sulfur Vulcanization of Natural Rubber in Presence and Absence of Dicumyl Peroxide","volume":"43","author":"Manik","year":"1970","journal-title":"Rubber Chem. Technol."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"342","DOI":"10.5254\/1.3542150","article-title":"Investigation of Radical and Polar Mechanisms in Vulcanization Reactions","volume":"33","author":"Shelton","year":"1960","journal-title":"Rubber Chem. Technol."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"844","DOI":"10.5254\/1.3539615","article-title":"A Study of Sulfenamide Acceleration","volume":"36","author":"Morita","year":"1963","journal-title":"Rubber Chem. Technol."},{"key":"ref_32","unstructured":"Heideman, G. (2004). Reduced Zinc Oxide Levels in Sulphur Vulcanization of Rubber Compounds. [Ph.D. Thesis, University of Twente]."},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Sowinska, A., Maciejewska, M., Guo, L., and Delebecq, E. (2019). Thermal Analysis and SEM Microscopy Applied to Studying the Efficiency of Ionic Liquid Immobilization on Solid Supports. Materials, 12.","DOI":"10.3390\/ma12101579"},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Sowinska, A., Maciejewska, M., Guo, L., and Delebecq, E. (2020). Effect of SILPs on the Vulcanization and Properties of Ethylene\u2013Propylene\u2013Diene Elastomer. Polymers, 12.","DOI":"10.3390\/polym12061220"},{"key":"ref_35","unstructured":"International Organization for Standardization (2017). ISO 1817:2015, Rubber, Vulcanized or Thermoplastic\u2014Determination of Effect of Liquids, International Organization for Standardization."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"521","DOI":"10.1063\/1.1723792","article-title":"Statistical mechanics of cross-linked polymer networks. II. Swelling","volume":"11","author":"Flory","year":"1943","journal-title":"J. Chem. Phys."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"1109","DOI":"10.5254\/1.3547386","article-title":"Crosslink density evaluation of EPDM vulcanizates","volume":"44","author":"Zamboni","year":"1971","journal-title":"Rubber Chem. Technol."},{"key":"ref_38","unstructured":"International Organization for Standardization (2017). ISO 37:2017, Rubber, Vulcanized or Thermoplastic\u2014Determination of Tensile Stress-Strain Properties, International Organization for Standardization."},{"key":"ref_39","unstructured":"International Organization for Standardization (2003). ISO 868:2003, Plastics and Ebonite\u2014Determination of Indentation Hardness by Means of a durometer (Shore Hardness), International Organization for Standardization."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"9987","DOI":"10.1021\/ic801213z","article-title":"Carboxyl-Functionalized Task-Specific Ionic Liquids for Solubilizing Metal Oxides","volume":"47","author":"Nockemann","year":"2008","journal-title":"Inorg. Chem."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"7512","DOI":"10.1021\/jo971176v","article-title":"NMR Chemical Shifts of Common Laboratory Solvents as Trace Impurities","volume":"62","author":"Gottlieb","year":"1997","journal-title":"J. Org. Chem."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"1388","DOI":"10.1002\/app.21364","article-title":"Influence of Zinc Oxide during Different Stages of Sulfur Vulcanization. Elucidated by Model Compound Vulcanization","volume":"95","author":"Heideman","year":"2005","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"657","DOI":"10.1002\/masy.200651393","article-title":"Various Ways to Reduce Zinc Oxide Levels in S-SBR Rubber Compounds","volume":"245\u2013246","author":"Heideman","year":"2006","journal-title":"Macromol. Symp."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"1563","DOI":"10.1007\/s10973-011-2028-1","article-title":"Thermal properties and combustibility of elastomer-protein composites Part, I. Composites SBR-keratin","volume":"109","author":"Prochon","year":"2012","journal-title":"J. Therm. Anal. Calorim."}],"container-title":["Polymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4360\/13\/5\/774\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T05:32:00Z","timestamp":1760160720000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4360\/13\/5\/774"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,3,3]]},"references-count":44,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2021,3]]}},"alternative-id":["polym13050774"],"URL":"https:\/\/doi.org\/10.3390\/polym13050774","relation":{},"ISSN":["2073-4360"],"issn-type":[{"value":"2073-4360","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,3,3]]}}}