Mechanical degradation of poly(ethylene terephthalate) and its structural modification by chain extender

Saabome, Samuel Muobom; Lee, Jae Eun; Hong, Joung Sook; Kim, Dong Hak; Ahn, Kyung Hyun

doi:10.1007/s13367-023-00059-w

Cited by 8 publications

(1 citation statement)

References 30 publications

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“…11 ADR chain extenders are currently used in the industry and they are multifunctional oligomeric chain extenders that contain epoxy groups in their backbone and react with the carboxyl and hydroxyl end-groups of polyesters. 12 For example, the commercial chain extender Joncryl® ADR4468 (J) is a proprietary, multi-epoxy functionalized polymer which has good thermal stability and is used for certain food contact applications in polycondensation polymers such as PET, poly(butylene terephthalate) and poly(lactic acid). 13 The IVs and mechanical properties of recycled PET can be improved either by adding chain extenders or by the SSP process.…”

Section: Introductionmentioning

confidence: 99%

Achieving bottle‐grade poly(ethylene terephthalate)‐like properties from blends of bottle‐grade and thermoform‐grade poly(ethylene terephthalate)

Ganapathi,

Abdelwahab,

Rabnawaz

2024

Polymer International

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Poly(ethylene terephthalate) (PET), both bottle grade (PET‐B) and thermoform grade (PET‐T), are widely used in the packaging sector. However, only PET‐B is recycled and reused, while PET‐T needs to be separated from recycled PET bales. This study aims to assess the impact of solid‐state polymerization (SSP), chain extension, and the combination of chain extension‐SSP to transform PET‐B and PET‐T blends into PET‐T‐like material. The intrinsic viscosity (IV) values for PET‐B blends with 10–20 wt% of PET‐T are measured for the samples obtained in this study. The mechanical properties, such as tensile, modulus, elongation, and impact strengths, were also determined. The glass transition temperature (Tg), melting temperature (Tm), crystallinity, and thermal degradation are also investigated. The findings suggest that the combination of SSP and chain extension leads to a significant improvement in IV and tensile strength, while SSP alone is less suitable to offer the desired IV values.

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Section: Introductionmentioning

confidence: 99%

Achieving bottle‐grade poly(ethylene terephthalate)‐like properties from blends of bottle‐grade and thermoform‐grade poly(ethylene terephthalate)

Ganapathi,

Abdelwahab,

Rabnawaz

2024

Polymer International

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Modification of chain extension and crosslinking structures of recycled polyester textile for 3D printing filament

Hu,

Sun,

Zhang

et al. 2024

Vinyl Additive Technology

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The increase in amount of polyester textile waste is contributing to the severity of environmental pollution because polyester cannot be easily recycled. To reduce the limits of its recyclability, a value‐added recycling approach should be explored. This work introduces an approach for recycling polyester textiles into 3D printable filaments. To increase recyclability of polyester textiles, the polyester materials are modified by ADR4468 additive. After the polyester is 3D printed, the sample with 1.0 wt% of ADR4468 shows the highest tensile and compressive strength properties compared with 1.5 and 2.0 wt%, owing to its fewer voids between the printed lines, a fish scale‐like morphology that spreads out, and a higher degree of crystallization. Moreover, the mechanism of modification suggests that ADR4468 extends and crosslinks the polyester chains by ring‐opening reactions of epoxy groups of ADR4468 and forms sea‐island structures. The sea‐island structures of bonded polyester branched cores with tangled polyester shell interface areas and unbonded polyester chain areas performed suitable rheological behaviors to recycle polyester textiles for 3D printable filaments production. The filaments can be used to replace commercially available filaments, offer a sustainable option for consumers, and impact both the polyester textile‐related recycling and 3D printing industries.Highlights An approach is proposed to recycle polyester textiles for 3D printing filament The approach uses a mechanical method to recycle polyester textiles Recycled polyesters were modified by ADR4468 to form core‐shell structures Core‐shell structures were separated by short polyesters(sea‐island structure) The structures met rheological behaviors for 3D printing filament

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Development of Glycolysis Catalysts for PET Wastes Including Polyester Textiles

Kim,

Jang,

Hwang

et al. 2024

Fibers Polym

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Mechanical degradation of poly(ethylene terephthalate) and its structural modification by chain extender

Cited by 8 publications

References 30 publications

Achieving bottle‐grade poly(ethylene terephthalate)‐like properties from blends of bottle‐grade and thermoform‐grade poly(ethylene terephthalate)

Achieving bottle‐grade poly(ethylene terephthalate)‐like properties from blends of bottle‐grade and thermoform‐grade poly(ethylene terephthalate)

Modification of chain extension and crosslinking structures of recycled polyester textile for 3D printing filament

Development of Glycolysis Catalysts for PET Wastes Including Polyester Textiles

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