Mechanical properties of a polyurethane-based composite modified with boron nitride

Mechanical properties of a polyurethane-based composite modified with boron nitride | 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 Mechanical properties of a polyurethane-based composite modified with boron nitride Matanat Mehrabova, Sevinj Safarova, Niyazi Hasanov, Farhad Kerimov This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5422622/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Polyurethane based composite formulation is developed, characterized by a significantly low amount of additives and their technological compatibility. It is shown that content of 0,05 mass% boron nitride in the polyurethane composition is optimal, as it leads to an increase in the mechanical strength of the film. This study presents temperature-time dependence of the mechanical strength of polyurethane films and the influence of BN additives on these characteristics. İt was defined that the observed increase in film strength at incorporating 0,05% by mass of BN to its content, associated with changes in the supramolecular structure, specifically the formation of spherulitic microstructure of supramolecular polyurethane. In the mechanical field, the bond rupture process is accelerated, thus the role of the load involves reducing bond energy, altering the distance between kinetic units, and fixing their movements, particularly difficulty of recombination of radicals. The structure of the formula in the durability equation suggests that the contribution of the load to bond rupture is represented by the term ασ mechanical field work. Throughout the entire range of applied loads, the product of ασ was significantly lower than activation energy. Therefore, the thermal fluctuations are the main factor causing breakdown, meaning the energy for body rupture is largely derived from thermal energy reserves rather than external work. Initial activation energy for mechanical failure of PU films and its optimally modified state remains unchanged. However, the additive influences to the magnitude of the structural sensitivity coefficient and the mechanical strength, so rupture occurs through chemical bonds. polyurethane composite durability boron nitride activation energy Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted 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-5422622","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":377195315,"identity":"91aaf542-e83e-4981-a91f-891e9b7568f3","order_by":0,"name":"Matanat Mehrabova","email":"","orcid":"","institution":"Azerbaijan Technical University","correspondingAuthor":false,"prefix":"","firstName":"Matanat","middleName":"","lastName":"Mehrabova","suffix":""},{"id":377195316,"identity":"3217f84d-a7a6-4639-a46c-363282a846f1","order_by":1,"name":"Sevinj Safarova","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAABE0lEQVRIie3QsWrDMBCAYQmBswS8XobGr2DjpZA0eRUZg700dPXQ4UJAGb1m6zN062gjcBeB14w2gc4tnbKUXiC0BFS3Ywf9INCgT+jEmMv1L+Pd914yNj1vxQAR4QWJz6f/SqgEfyPBdsMPRaED5usG+qdFXpZtA6yYJTh67mwkNFpExugIIcsgMelqV2kPmMkTHEtpJXDXTNYq4wjjOExUtcJ64wFXml4oK+vDHg6jI5El+u37ieSBFkQ+iPg9WofZC4+v1ZzuvOUdERk2J4JEILWK0KRigmae0iwRkTR6NCK+lk0eK3j54cc0f8MCbtDXXX1Ui2Da1v3+9X52Vfq59ce+Wl6MKml5g+ddLpfLNdQnqp5ejnmAJWwAAAAASUVORK5CYII=","orcid":"","institution":"Azerbaijan Technical University","correspondingAuthor":true,"prefix":"","firstName":"Sevinj","middleName":"","lastName":"Safarova","suffix":""},{"id":377195317,"identity":"d871ffcb-aef2-4b0a-b9e1-f07ab4a5172c","order_by":2,"name":"Niyazi Hasanov","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Niyazi","middleName":"","lastName":"Hasanov","suffix":""},{"id":377195318,"identity":"e2406658-f7b7-48f4-a780-54c1cf19e4ba","order_by":3,"name":"Farhad Kerimov","email":"","orcid":"","institution":"Azerbaijan Technical University","correspondingAuthor":false,"prefix":"","firstName":"Farhad","middleName":"","lastName":"Kerimov","suffix":""}],"badges":[],"createdAt":"2024-11-09 15:23:25","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-5422622/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-5422622/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":83377440,"identity":"e71133dd-47ce-4fc0-964e-2d7c8d74d63b","added_by":"auto","created_at":"2025-05-24 07:46:42","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":569512,"visible":true,"origin":"","legend":"","description":"","filename":"article.pdf","url":"https://assets-eu.researchsquare.com/files/rs-5422622/v1_covered_f3d73782-56f9-4aae-a1b1-2a6bba28f1ef.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":" Mechanical properties of a polyurethane-based composite modified with boron nitride","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"polyurethane, composite, durability, boron nitride, activation energy","lastPublishedDoi":"10.21203/rs.3.rs-5422622/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-5422622/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003ePolyurethane based composite formulation is developed, characterized by a significantly low amount of additives and their technological compatibility. It is shown that content of 0,05 mass% boron nitride in the polyurethane composition is optimal, as it leads to an increase in the mechanical strength of the film. This study presents temperature-time dependence of the mechanical strength of polyurethane films and the influence of BN additives on these characteristics. İt was defined that the observed increase in film strength at incorporating 0,05% by mass of BN to its content, associated with changes in the supramolecular structure, specifically the formation of spherulitic microstructure of supramolecular polyurethane. In the mechanical field, the bond rupture process is accelerated, thus the role of the load involves reducing bond energy, altering the distance between kinetic units, and fixing their movements, particularly difficulty of recombination of radicals. The structure of the formula in the durability equation suggests that the contribution of the load to bond rupture is represented by the term \u003cem\u003eασ\u003c/em\u003e mechanical field work. Throughout the entire range of applied loads, the product of \u003cem\u003eασ\u003c/em\u003e was significantly lower than activation energy. Therefore, the thermal fluctuations are the main factor causing breakdown, meaning the energy for body rupture is largely derived from thermal energy reserves rather than external work. Initial activation energy for mechanical failure of PU films and its optimally modified state remains unchanged. 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