Effect of bis-TEMPO Sebacate on Mechanical Properties and Oxidative Resistance of Peroxide-Crosslinked Polyolefin Compositions.
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| Title: | Effect of bis-TEMPO Sebacate on Mechanical Properties and Oxidative Resistance of Peroxide-Crosslinked Polyolefin Compositions. |
|---|---|
| Authors: | Chizhov, Artem1 (AUTHOR) chizhov@inorg.chem.msu.ru, Goriaev, Aleksandr2,3 (AUTHOR), Belus, Svetlana3,4 (AUTHOR), Svistunov, Maksim3,4 (AUTHOR) |
| Source: | Polymers (20734360). Dec2025, Vol. 17 Issue 24, p3325. 15p. |
| Subjects: | Polyolefins, Crosslinking (Polymerization), Free radical scavengers, Radicals (Chemistry), Mechanical behavior of materials, Antioxidants |
| Abstract: | TEMPO derivatives are well known as scorch retardants due to their ability to effectively quench free alkyl radicals during peroxide crosslinking of polymer compositions. However, in practice this leads to the loss of crosslinking density due to a irreversible decrease in the number of alkyl radicals involved in the crosslinking process. One approach to solving this problem is the use of TEMPO-based biradical molecules, which, on the one hand, are able to effectively quench alkyl radicals, and on the other hand, can couple macroradicals, partially compensating for the loss of crosslinking density. The aim of this work was to reveal the effect of bis(1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) sebacate (bis-TEMPO) in the concentration range of 0.11–0.44 phr on the delay in the onset of dynamic crosslinking of polyolefin composites initiated by peroxide, as well as the oxidative stability of the resulting crosslinked composites. The obtained data show that using bis-TEMPO at a concentration of less than 0.27 phr increases the crosslinking density of the polyolefin composite, with a crosslinking onset delay of up to 36 s achieved. Simultaneously, antioxidant functionality of bis-TEMPO in crosslinked composites is considered moderate and leads to an increase in the OIT values by 1.7–2.8 times. The crosslinking onset delay time under dynamic conditions is well described by a first-order kinetic model at a constant temperature. The obtained data confirm the efficiency and predictability of bis-TEMPO as a scorch retardant for polyolefin composites. [ABSTRACT FROM AUTHOR] |
| Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 190525095 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Effect of bis-TEMPO Sebacate on Mechanical Properties and Oxidative Resistance of Peroxide-Crosslinked Polyolefin Compositions. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Chizhov%2C+Artem%22">Chizhov, Artem</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> chizhov@inorg.chem.msu.ru</i><br /><searchLink fieldCode="AR" term="%22Goriaev%2C+Aleksandr%22">Goriaev, Aleksandr</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Belus%2C+Svetlana%22">Belus, Svetlana</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Svistunov%2C+Maksim%22">Svistunov, Maksim</searchLink><relatesTo>3,4</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. Dec2025, Vol. 17 Issue 24, p3325. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Polyolefins%22">Polyolefins</searchLink><br /><searchLink fieldCode="DE" term="%22Crosslinking+%28Polymerization%29%22">Crosslinking (Polymerization)</searchLink><br /><searchLink fieldCode="DE" term="%22Free+radical+scavengers%22">Free radical scavengers</searchLink><br /><searchLink fieldCode="DE" term="%22Radicals+%28Chemistry%29%22">Radicals (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink><br /><searchLink fieldCode="DE" term="%22Antioxidants%22">Antioxidants</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: TEMPO derivatives are well known as scorch retardants due to their ability to effectively quench free alkyl radicals during peroxide crosslinking of polymer compositions. However, in practice this leads to the loss of crosslinking density due to a irreversible decrease in the number of alkyl radicals involved in the crosslinking process. One approach to solving this problem is the use of TEMPO-based biradical molecules, which, on the one hand, are able to effectively quench alkyl radicals, and on the other hand, can couple macroradicals, partially compensating for the loss of crosslinking density. The aim of this work was to reveal the effect of bis(1-oxyl-2,2,6,6-tetramethylpiperidin-4-yl) sebacate (bis-TEMPO) in the concentration range of 0.11–0.44 phr on the delay in the onset of dynamic crosslinking of polyolefin composites initiated by peroxide, as well as the oxidative stability of the resulting crosslinked composites. The obtained data show that using bis-TEMPO at a concentration of less than 0.27 phr increases the crosslinking density of the polyolefin composite, with a crosslinking onset delay of up to 36 s achieved. Simultaneously, antioxidant functionality of bis-TEMPO in crosslinked composites is considered moderate and leads to an increase in the OIT values by 1.7–2.8 times. The crosslinking onset delay time under dynamic conditions is well described by a first-order kinetic model at a constant temperature. The obtained data confirm the efficiency and predictability of bis-TEMPO as a scorch retardant for polyolefin composites. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/polym17243325 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 3325 Subjects: – SubjectFull: Polyolefins Type: general – SubjectFull: Crosslinking (Polymerization) Type: general – SubjectFull: Free radical scavengers Type: general – SubjectFull: Radicals (Chemistry) Type: general – SubjectFull: Mechanical behavior of materials Type: general – SubjectFull: Antioxidants Type: general Titles: – TitleFull: Effect of bis-TEMPO Sebacate on Mechanical Properties and Oxidative Resistance of Peroxide-Crosslinked Polyolefin Compositions. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Chizhov, Artem – PersonEntity: Name: NameFull: Goriaev, Aleksandr – PersonEntity: Name: NameFull: Belus, Svetlana – PersonEntity: Name: NameFull: Svistunov, Maksim IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 12 Text: Dec2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 20734360 Numbering: – Type: volume Value: 17 – Type: issue Value: 24 Titles: – TitleFull: Polymers (20734360) Type: main |
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