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Closed-Loop Chemical Recycling of Poly(butylene succinate) Using Organocatalysts.

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Title: Closed-Loop Chemical Recycling of Poly(butylene succinate) Using Organocatalysts.
Authors: Liu, Na1 (AUTHOR), Du, Peng2 (AUTHOR), Meng, Yi1 (AUTHOR), Zhang, Gangqiang1,2 (AUTHOR), Zhang, Kaitao1 (AUTHOR), Pan, Yu1 (AUTHOR) ypan@qdu.edu.cn
Source: Polymers (20734360). Jun2026, Vol. 18 Issue 11, p1267. 15p.
Subjects: Chemical recycling, Depolymerization, Methanolysis, Catalysts, Polyesters, Plastic recycling
Abstract: Plastics are indispensable to modern life, yet pose a double-edged sword as their escalating production threatens human health and ecosystems. This urgent reality drives intensive efforts to develop recycling technologies that convert waste plastics into valuable feedstocks. Herein, we develop an efficient organocatalytic strategy for the depolymerization and closed-loop chemical recycling of poly(butylene succinate) (PBS). The strong organic base TBD demonstrated the highest catalytic activity for the methanolysis depolymerization of PBS, achieving a yield of 93.1% under mild conditions (100 °C, 2 h). GC and MS analyses identified dimethyl succinate (DMS) and 1,4-butanediol (1,4-BDO) as the major products. Investigation into the depolymerization behavior and mechanism revealed that the process proceeds via random chain scission, facilitated by a dual hydrogen-bonding activation mechanism mediated by TBD. Closed-loop chemical recycling was achieved by repolymerizing the recovered monomers into PBS. The reproduced polymer exhibited properties comparable to commercial virgin PBS. Moreover, this strategy could be extended to other commercial polyester systems, establishing an eco-friendly and viable pathway for sustainable polymer recycling. [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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DbLabel: Engineering Source
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PubTypeId: academicJournal
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  Label: Title
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  Data: Closed-Loop Chemical Recycling of Poly(butylene succinate) Using Organocatalysts.
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  Data: <searchLink fieldCode="AR" term="%22Liu%2C+Na%22">Liu, Na</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Du%2C+Peng%22">Du, Peng</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Meng%2C+Yi%22">Meng, Yi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Gangqiang%22">Zhang, Gangqiang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Kaitao%22">Zhang, Kaitao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Pan%2C+Yu%22">Pan, Yu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ypan@qdu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Polymers+%2820734360%29%22">Polymers (20734360)</searchLink>. Jun2026, Vol. 18 Issue 11, p1267. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Chemical+recycling%22">Chemical recycling</searchLink><br /><searchLink fieldCode="DE" term="%22Depolymerization%22">Depolymerization</searchLink><br /><searchLink fieldCode="DE" term="%22Methanolysis%22">Methanolysis</searchLink><br /><searchLink fieldCode="DE" term="%22Catalysts%22">Catalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Polyesters%22">Polyesters</searchLink><br /><searchLink fieldCode="DE" term="%22Plastic+recycling%22">Plastic recycling</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Plastics are indispensable to modern life, yet pose a double-edged sword as their escalating production threatens human health and ecosystems. This urgent reality drives intensive efforts to develop recycling technologies that convert waste plastics into valuable feedstocks. Herein, we develop an efficient organocatalytic strategy for the depolymerization and closed-loop chemical recycling of poly(butylene succinate) (PBS). The strong organic base TBD demonstrated the highest catalytic activity for the methanolysis depolymerization of PBS, achieving a yield of 93.1% under mild conditions (100 °C, 2 h). GC and MS analyses identified dimethyl succinate (DMS) and 1,4-butanediol (1,4-BDO) as the major products. Investigation into the depolymerization behavior and mechanism revealed that the process proceeds via random chain scission, facilitated by a dual hydrogen-bonding activation mechanism mediated by TBD. Closed-loop chemical recycling was achieved by repolymerizing the recovered monomers into PBS. The reproduced polymer exhibited properties comparable to commercial virgin PBS. Moreover, this strategy could be extended to other commercial polyester systems, establishing an eco-friendly and viable pathway for sustainable polymer recycling. [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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      – Type: doi
        Value: 10.3390/polym18111267
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 1267
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      – SubjectFull: Chemical recycling
        Type: general
      – SubjectFull: Depolymerization
        Type: general
      – SubjectFull: Methanolysis
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      – SubjectFull: Catalysts
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      – SubjectFull: Polyesters
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      – SubjectFull: Plastic recycling
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      – TitleFull: Closed-Loop Chemical Recycling of Poly(butylene succinate) Using Organocatalysts.
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          Name:
            NameFull: Liu, Na
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            NameFull: Du, Peng
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            NameFull: Meng, Yi
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            NameFull: Zhang, Gangqiang
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            NameFull: Zhang, Kaitao
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            NameFull: Pan, Yu
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            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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