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Industrially Adaptable Way for Upcycling of Mixed iPP and PE via In Situ Compatibilization.

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Title: Industrially Adaptable Way for Upcycling of Mixed iPP and PE via In Situ Compatibilization.
Authors: Gao, Shiji1 (AUTHOR), Yu, Chong1 (AUTHOR), Li, Xiaopei2 (AUTHOR), Huang, Enming3 (AUTHOR), Wang, Shiyu1 (AUTHOR), Zhang, Xuanwei1 (AUTHOR), Zhang, Yongjie1 (AUTHOR) yjzhang@dlpu.edu.cn
Source: Polymers for Advanced Technologies. Apr2025, Vol. 36 Issue 4, p1-11. 11p.
Subjects: Flexural modulus, Interfacial tension, Impact strength, Infrared spectroscopy, Phase separation
Abstract: Recycling of discarded polyolefins is vital to reducing dependence on oil, promoting resource sustainability, and achieving a closed‐loop economy. Direct recycling without time‐ and labor‐consuming sorting is an efficient and economical approach to the treatment of polyolefins from mixed waste streams. However, the immiscibility of different polyolefins would lead to severe phase separation and inferior properties of generated blends. To solve this problem, an acyloxyimide‐based initiator, namely N‐acetoxy‐phthalimide (NAPI), was utilized to in situ generate graft copolymers and grafted/functionalized polyolefins via a simple, one‐step, and scalable reactive blending approach. Compared to traditional peroxide initiators, NAPI is a more efficient H‐abstracting agent while avoiding undesired side reactions (β‐scission and cross‐linking). The in situ resultant graft copolymers and grafted/functionalized polyolefins serve as efficient compatibilizers that considerably enhance the compatibility of binary isotactic polypropylene (iPP) and polyethylene (PE) blends by reducing interfacial tension and, consequently, improving the mechanical properties of mixed polyolefin blends. The presence of iPP‐PE graft copolymer was solidly evidenced by infrared spectroscopy analyses. Compared to the control iPP/PE blend, the elongation at break, impact strength, and bending modulus of the modified iPP/PE blend increased by 471.7%, 21.5%, and 45.7%, respectively. [ABSTRACT FROM AUTHOR]
Copyright of Polymers for Advanced Technologies 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.)
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  Data: Industrially Adaptable Way for Upcycling of Mixed iPP and PE via In Situ Compatibilization.
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  Data: Recycling of discarded polyolefins is vital to reducing dependence on oil, promoting resource sustainability, and achieving a closed‐loop economy. Direct recycling without time‐ and labor‐consuming sorting is an efficient and economical approach to the treatment of polyolefins from mixed waste streams. However, the immiscibility of different polyolefins would lead to severe phase separation and inferior properties of generated blends. To solve this problem, an acyloxyimide‐based initiator, namely N‐acetoxy‐phthalimide (NAPI), was utilized to in situ generate graft copolymers and grafted/functionalized polyolefins via a simple, one‐step, and scalable reactive blending approach. Compared to traditional peroxide initiators, NAPI is a more efficient H‐abstracting agent while avoiding undesired side reactions (β‐scission and cross‐linking). The in situ resultant graft copolymers and grafted/functionalized polyolefins serve as efficient compatibilizers that considerably enhance the compatibility of binary isotactic polypropylene (iPP) and polyethylene (PE) blends by reducing interfacial tension and, consequently, improving the mechanical properties of mixed polyolefin blends. The presence of iPP‐PE graft copolymer was solidly evidenced by infrared spectroscopy analyses. Compared to the control iPP/PE blend, the elongation at break, impact strength, and bending modulus of the modified iPP/PE blend increased by 471.7%, 21.5%, and 45.7%, respectively. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Polymers for Advanced Technologies 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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        Value: 10.1002/pat.70183
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        Text: English
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        PageCount: 11
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      – SubjectFull: Flexural modulus
        Type: general
      – SubjectFull: Interfacial tension
        Type: general
      – SubjectFull: Impact strength
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      – SubjectFull: Infrared spectroscopy
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      – SubjectFull: Phase separation
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      – TitleFull: Industrially Adaptable Way for Upcycling of Mixed iPP and PE via In Situ Compatibilization.
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            NameFull: Gao, Shiji
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            NameFull: Yu, Chong
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            NameFull: Li, Xiaopei
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            NameFull: Wang, Shiyu
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              M: 04
              Text: Apr2025
              Type: published
              Y: 2025
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