Comparative Thermal and Viscoelastic Performance of Virgin and Recycled HDPE/PP Blends: Implications for Melt Swelling Behavior.
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| Title: | Comparative Thermal and Viscoelastic Performance of Virgin and Recycled HDPE/PP Blends: Implications for Melt Swelling Behavior. |
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| Authors: | Ayhan Özkan, Kadriye Nergiz1 (AUTHOR), Saltan, Fehmi2 (AUTHOR) fehmisaltan@karatekin.edu.tr, Şirin, Kamil1 (AUTHOR) |
| Source: | Macromolecular Materials & Engineering. May2026, Vol. 311 Issue 5, p1-14. 14p. |
| Subjects: | High density polyethylene, Plastic recycling, Dynamic mechanical analysis, Thermal expansion, Viscoelasticity, Polypropylene, Thermal stability, Crystallinity |
| Abstract: | In this study, virgin/recycled HDPE and polypropylene (PP) blends containing 0–30 wt.% post‐consumer recycled fraction, together with fully recycled references, were melt‐processed and comparatively investigated to evaluate the effects of recycled incorporation on thermal stability, viscoelastic response, and melt swelling behavior. Thermogravimetric analysis showed that increasing recycled content reduced early degradation stability, with T2% decreasing from 458.7°C to 390.1°C in HDPE systems and from 418.8°C to 386.8°C in PP systems, while Tmax remained relatively stable. Differential scanning calorimetry revealed nearly unchanged melting temperatures but a marked reduction in crystallinity in both polymer families. Dynamic mechanical analysis indicated composition‐dependent shifts in relaxation behavior and reduced storage modulus stability at higher recycled fractions. Die swell measurements demonstrated a pronounced decline in melt recovery, decreasing from +29.1% to +14.0% in HDPE blends and from +34.0% to −1.43% in PP systems. Overall, the results show that moderate recycled incorporation preserves the principal thermal transition profile, whereas crystallinity, viscoelastic softening behavior, and post‐extrusion dimensional recovery become progressively more sensitive with increasing recycled content. [ABSTRACT FROM AUTHOR] |
| Copyright of Macromolecular Materials & Engineering is the property of Wiley-Blackwell 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.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 194164314 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Comparative Thermal and Viscoelastic Performance of Virgin and Recycled HDPE/PP Blends: Implications for Melt Swelling Behavior. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ayhan+Özkan%2C+Kadriye+Nergiz%22">Ayhan Özkan, Kadriye Nergiz</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Saltan%2C+Fehmi%22">Saltan, Fehmi</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> fehmisaltan@karatekin.edu.tr</i><br /><searchLink fieldCode="AR" term="%22Şirin%2C+Kamil%22">Şirin, Kamil</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Macromolecular+Materials+%26+Engineering%22">Macromolecular Materials & Engineering</searchLink>. May2026, Vol. 311 Issue 5, p1-14. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22High+density+polyethylene%22">High density polyethylene</searchLink><br /><searchLink fieldCode="DE" term="%22Plastic+recycling%22">Plastic recycling</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+mechanical+analysis%22">Dynamic mechanical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+expansion%22">Thermal expansion</searchLink><br /><searchLink fieldCode="DE" term="%22Viscoelasticity%22">Viscoelasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Polypropylene%22">Polypropylene</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Crystallinity%22">Crystallinity</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In this study, virgin/recycled HDPE and polypropylene (PP) blends containing 0–30 wt.% post‐consumer recycled fraction, together with fully recycled references, were melt‐processed and comparatively investigated to evaluate the effects of recycled incorporation on thermal stability, viscoelastic response, and melt swelling behavior. Thermogravimetric analysis showed that increasing recycled content reduced early degradation stability, with T2% decreasing from 458.7°C to 390.1°C in HDPE systems and from 418.8°C to 386.8°C in PP systems, while Tmax remained relatively stable. Differential scanning calorimetry revealed nearly unchanged melting temperatures but a marked reduction in crystallinity in both polymer families. Dynamic mechanical analysis indicated composition‐dependent shifts in relaxation behavior and reduced storage modulus stability at higher recycled fractions. Die swell measurements demonstrated a pronounced decline in melt recovery, decreasing from +29.1% to +14.0% in HDPE blends and from +34.0% to −1.43% in PP systems. Overall, the results show that moderate recycled incorporation preserves the principal thermal transition profile, whereas crystallinity, viscoelastic softening behavior, and post‐extrusion dimensional recovery become progressively more sensitive with increasing recycled content. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Macromolecular Materials & Engineering is the property of Wiley-Blackwell 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: 10.1002/mame.70240 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1 Subjects: – SubjectFull: High density polyethylene Type: general – SubjectFull: Plastic recycling Type: general – SubjectFull: Dynamic mechanical analysis Type: general – SubjectFull: Thermal expansion Type: general – SubjectFull: Viscoelasticity Type: general – SubjectFull: Polypropylene Type: general – SubjectFull: Thermal stability Type: general – SubjectFull: Crystallinity Type: general Titles: – TitleFull: Comparative Thermal and Viscoelastic Performance of Virgin and Recycled HDPE/PP Blends: Implications for Melt Swelling Behavior. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ayhan Özkan, Kadriye Nergiz – PersonEntity: Name: NameFull: Saltan, Fehmi – PersonEntity: Name: NameFull: Şirin, Kamil IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 14387492 Numbering: – Type: volume Value: 311 – Type: issue Value: 5 Titles: – TitleFull: Macromolecular Materials & Engineering Type: main |
| ResultId | 1 |
