Superior glycidol-free chain extenders for post-consumer PET bottles and PET thermoform blends

Mestry, Jayesh; Abdelwahab, Mohamed A.; Elkholy, Hazem M.; Rabnawaz, Muhammad

doi:10.1016/j.resconrec.2024.107420

Cited by 5 publications

(6 citation statements)

References 23 publications

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“…The EAT polymer percentage in P(EAT- co -BA) copolymers was calculated from the 1 H NMR spectra (Table ). , It was found that the percentage of the EAT units in these copolymers ranged from 8% to 17%. The EAI mol % percent in the P(EAI- co -BA) copolymers was calculated from 1 H NMR spectra (Table ) , and was found to be in the range of 6.6–19.2%.…”

Section: Resultsmentioning

confidence: 95%

“…Using our recent work, , glycidol- and styrene-free chain epoxy extenders were synthesized. The monomers (EAT and EAI) were synthesized through two-step preparations, as shown in Scheme S1.…”

Section: Resultsmentioning

confidence: 99%

“…Chain extenders P(EAT- co -BA) and P(EAI- co -BA) were synthesized using procedure that we reported recently . The synthetic route is shown in Scheme S1.…”

Section: Methodsmentioning

confidence: 99%

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Glycidol-Free Aliphatic Copolymers as Chain Extenders for Polylactic Acid and Their Cost and Carbon Emission Assessments

Abdelwahab,

Elkholy,

Khan

et al. 2024

ACS Sustainable Chem. Eng.

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Reported herein is the impact of glycidol-free chain extenders on poly(lactic acid) (PLA) to enhance its mechanical properties. Gel permeation chromatography characterization confirmed the molecular weight (M w ) of the chain extenders as well as the chain-extended PLA samples. Tensile properties, such as elongation, modulus, and impact strength, were evaluated for the chainextended PLA and compared with those of a commercial chain extender. Thermal characteristics of the chain-extended PLA were measured by using thermogravimetric analysis and differential scanning calorimetry. The complex viscosity and storage modulus for chain-extended PLA were also determined. Cost analysis and CO 2 emission estimates are conducted for the new chain extenders and are compared with commercial chain extenders. Overall, chain extenders are likely to offer economic, health, and environmental benefits.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

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Glycidol-Free Aliphatic Copolymers as Chain Extenders for Polylactic Acid and Their Cost and Carbon Emission Assessments

Abdelwahab,

Elkholy,

Khan

et al. 2024

ACS Sustainable Chem. Eng.

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“…The synthesis of EAT and EAI was performed according to ref. 27–29. The IR spectra of EAT and EAI showed that they exhibited carbonyl group stretching at 1716 cm −1 and double bonds at about 1637 cm −1 (Fig.…”

Section: Resultsmentioning

confidence: 96%

“…EAT and EAI were synthesized in two steps from their unsaturated long-chain alcohol using our recently reported method. 27,28 Details about the synthesis and characterization of EAT and EAI are provided in the ESI †…”

Section: Methodsmentioning

confidence: 99%

Food-safe glycidyl-free chain extenders for polylactides

Elkholy,

Abdelwahab,

Naveed

et al. 2024

Green Chem.

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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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Superior glycidol-free chain extenders for post-consumer PET bottles and PET thermoform blends

Cited by 5 publications

References 23 publications

Glycidol-Free Aliphatic Copolymers as Chain Extenders for Polylactic Acid and Their Cost and Carbon Emission Assessments

Glycidol-Free Aliphatic Copolymers as Chain Extenders for Polylactic Acid and Their Cost and Carbon Emission Assessments

Food-safe glycidyl-free chain extenders for polylactides

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

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