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Development of Bio-Based and Recyclable Epoxy Adhesives by Modification with Thermoplastic Polymers.

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  • معلومة اضافية
    • المصدر:
      Publisher: MDPI Country of Publication: Switzerland NLM ID: 101545357 Publication Model: Electronic Cited Medium: Internet ISSN: 2073-4360 (Electronic) Linking ISSN: 20734360 NLM ISO Abbreviation: Polymers (Basel) Subsets: PubMed not MEDLINE
    • بيانات النشر:
      Original Publication: Basel : MDPI
    • نبذة مختصرة :
      This paper deals with the design of novel epoxy adhesives by incorporating thermoplastic polymers such as polyetherimide (PEI) and poly(ε-caprolactone) (PCL) into a bio-based and recyclable epoxy resin, known as Polar Bear. The adhesives were characterized by their mechanical (quasi-static and dynamic) and rheological properties, thermal stability, and adhesion properties in single-lap joints tested at three different temperatures (i.e., -55 °C, 23 °C, 80 °C). The experimental results indicated that low PEI content substantially improved the mechanical performance and toughness of the adhesive, while preserving good processability. Nonetheless, exceeding 3% weight percentage adversely affected the adhesives' mechanical resistance and workability. Conversely, while PCL addition enhanced the adhesives' viscosity, it also decreased mechanical performance. However, its eco-friendliness offers potential for sustainable adhesive applications. It is worth noting that regardless of temperature, the modified adhesives consistently outperformed the commercial epoxy adhesive (DP-460), used as reference, in single-lap shear joint tests. Additionally, both PEI- and PCL-modified epoxy adhesives have demonstrated recyclability through a simple acid-based process, enabling joint disassembly and recycling of the adhesive into a thermoplastic polymer. Overall, the modified adhesives represent a promising eco-friendly, high-performance alternative for structural applications, aligning with sustainable and circular practices.
    • References:
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      Polymers (Basel). 2019 Mar 11;11(3):. (PMID: 30960445)
      RSC Adv. 2021 Nov 23;11(60):37830-37841. (PMID: 35498113)
      Polymers (Basel). 2024 Jul 06;16(13):. (PMID: 39000781)
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      Materials (Basel). 2018 Feb 28;11(3):. (PMID: 29495571)
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    • Contributed Indexing:
      Keywords: disassembling; epoxy adhesive; poly-ε-caprolactone (PCL); polyetherimide (PEI); recycling; single-lap joint
    • الموضوع:
      Date Created: 20250125 Latest Revision: 20250130
    • الموضوع:
      20250130
    • الرقم المعرف:
      PMC11768196
    • الرقم المعرف:
      10.3390/polym17020131
    • الرقم المعرف:
      39861204