Preparation and clay tolerance research of a polycarboxylate superplasticizer modified by phosphonate group

Preparation and clay tolerance research of a polycarboxylate superplasticizer modified by phosphonate group | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Preparation and clay tolerance research of a polycarboxylate superplasticizer modified by phosphonate group Ming Zhang, Chunfang Guo, Qian Zhang, Meishan PEI This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4385873/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 27 Jul, 2024 Read the published version in Journal of Polymer Research → Version 1 posted 5 You are reading this latest preprint version Abstract At present, it is a difficult engineering problem to control the workability of concrete with high clay content sand. A phosphonate group-modified polycarboxylate superplasticizer (PHS-PCE) was synthesized by using 2-(methacryloyloxy) ethyl phosphate (MOEP), isobutyl alcohol polyoxyethylene ether (IPEG) and acrylic acid (AA). Characterization of the molecular structure of PHS-PCE was conducted using Gel permeation chromatography (GPC), Fourier-transform infrared spectroscopy (FT-IR), 31P nuclear magnetic resonance (31P NMR) spectroscopy and elemental analysis measurements, showing successful incorporation of the phosphonate group with high polymer purity. However, owing to the low reactivity of MOEP, approximately 65 wt% monomer was introduced into the copolymer. PHS-PCE exhibited better flowability and stronger retardation effect than the conventional polycarboxylate superplasticizer (C-PCE), attributing to the increased negative charge density and complexing capacity with calcium ion caused by the phosphonate group. Under conditions of clay presence, the maximum variation of PHS-PCE adsorption on cement particle was 18 %, whereas that of C-PCE was 25 %. The phosphonate group in molecule promotes part of PHS-PCE to adsorb on the edges of clay, preventing intercalation and improving the clay tolerance. polycarboxylate superplasticizer phosphonate group absorption clay tolerance Full Text Cite Share Download PDF Status: Published Journal Publication published 27 Jul, 2024 Read the published version in Journal of Polymer Research → Version 1 posted Reviewers agreed at journal 22 May, 2024 Reviewers invited by journal 22 May, 2024 Editor invited by journal 12 May, 2024 Editor assigned by journal 08 May, 2024 First submitted to journal 08 May, 2024 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4385873","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":305487031,"identity":"fe861401-2551-48d5-8585-2db6af633b9c","order_by":0,"name":"Ming Zhang","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAt0lEQVRIiWNgGAWjYFACxvYfiX9sePj5G4jWwnxA4mFDmozkjANEa2FLkHzYcNjGoCGBSA3y084YGCTuOM9jwHCA8cPHHCK0MM7OMUhIPHObx5y5gVly5jYitDBL5xgcSGC7zWPZcICNmZcYLWzSOYYNCWzneEAaidPCI52WzJDYdoAELRLSyccYEs4k80jOONhMnF/kZye2Mf6osLPn528++OEjMVqQAGMDaepHwSgYBaNgFOAGAJuXNYgKKaZTAAAAAElFTkSuQmCC","orcid":"https://orcid.org/0000-0001-7517-0408","institution":"Zibo vocational institute","correspondingAuthor":true,"prefix":"","firstName":"Ming","middleName":"","lastName":"Zhang","suffix":""},{"id":305487032,"identity":"d70bdc8a-4c9a-4f13-8bd5-d6f390527704","order_by":1,"name":"Chunfang Guo","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Chunfang","middleName":"","lastName":"Guo","suffix":""},{"id":305487033,"identity":"c1980ad3-296c-4be8-8fee-326774c57218","order_by":2,"name":"Qian Zhang","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Qian","middleName":"","lastName":"Zhang","suffix":""},{"id":305487034,"identity":"fbe799a6-26ed-45e4-98bf-2e8bc9f519fd","order_by":3,"name":"Meishan PEI","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Meishan","middleName":"","lastName":"PEI","suffix":""}],"badges":[],"createdAt":"2024-05-08 02:07:52","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4385873/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4385873/v1","draftVersion":[],"editorialEvents":[{"content":"https://doi.org/10.1007/s10965-024-04085-2","type":"published","date":"2024-07-27T16:16:35+00:00"}],"editorialNote":"","failedWorkflow":false,"files":[{"id":61596550,"identity":"a8db555a-1f7a-4182-8cdc-f5dfb1cdae00","added_by":"auto","created_at":"2024-08-01 17:28:33","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":717359,"visible":true,"origin":"","legend":"","description":"","filename":"PreparationandclaytoleranceresearchofPHSPCE.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4385873/v1_covered_7eefde4e-d290-4906-9d4f-9df32af349a3.pdf"}],"financialInterests":"","formattedTitle":"Preparation and clay tolerance research of a polycarboxylate superplasticizer modified by phosphonate group","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"journal-of-polymer-research","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"jpol","sideBox":"Learn more about [Journal of Polymer Research](https://www.springer.com/journal/10965)","snPcode":"10965","submissionUrl":"https://www.editorialmanager.com/jpol/","title":"Journal of Polymer Research","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"polycarboxylate superplasticizer, phosphonate group, absorption, clay tolerance","lastPublishedDoi":"10.21203/rs.3.rs-4385873/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4385873/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"At present, it is a difficult engineering problem to control the workability of concrete with high clay content sand. A phosphonate group-modified polycarboxylate superplasticizer (PHS-PCE) was synthesized by using 2-(methacryloyloxy) ethyl phosphate (MOEP), isobutyl alcohol polyoxyethylene ether (IPEG) and acrylic acid (AA). Characterization of the molecular structure of PHS-PCE was conducted using Gel permeation chromatography (GPC), Fourier-transform infrared spectroscopy (FT-IR), 31P nuclear magnetic resonance (31P NMR) spectroscopy and elemental analysis measurements, showing successful incorporation of the phosphonate group with high polymer purity. However, owing to the low reactivity of MOEP, approximately 65 wt% monomer was introduced into the copolymer. PHS-PCE exhibited better flowability and stronger retardation effect than the conventional polycarboxylate superplasticizer (C-PCE), attributing to the increased negative charge density and complexing capacity with calcium ion caused by the phosphonate group. Under conditions of clay presence, the maximum variation of PHS-PCE adsorption on cement particle was 18 %, whereas that of C-PCE was 25 %. 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