Food-safe glycidyl-free chain extenders for polylactides

Elkholy, Hazem M.; Abdelwahab, Mohamed A.; Naveed, Muhammad; Abdelaziz, Khaled; Rabnawaz, Muhammad

doi:10.1039/d3gc04200f

Cited by 5 publications

(2 citation statements)

References 40 publications

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“…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%

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: 99%

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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“…Studies have shown that modification of PLA with epoxy chain expanders to obtain long branched structures is an effective way to improve the mechanical properties of PLA, epoxy chain extenders are versatile, thermally stable, and easy to obtain properties that can reconnect the cleaved chains by increasing the molecular weight and melt strength of the polymer and can also be used as reactive compatibilizers in blends. , Epoxy chain extenders can react with the end groups –OH and –COOH of PLA to form high molecular weight polymers . Sun et al used ADR epoxy chain extender to toughen PLA in the molten state.…”

Section: Introductionmentioning

confidence: 99%

Strategy to Antibacterial, High-Mechanical, and Degradable Polylactic Acid/Chitosan Composite Film through Reactive Compatibilization via Epoxy Chain Extender

Yan,

Wang,

Qiao

2024

ACS Omega

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Enhancement of toughness and gas barrier properties of PLA‐based films through bio‐based isosorbide dioctate: Synthesis, characterization, and application

Zhang,

Wang,

Wang

et al. 2024

Polymer Engineering & Sci

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Polylactic acid (PLA), as a bio‐based biodegradable material, has high tensile strength and modulus, but its low flexibility and poor barrier properties limit its application in packaging. In this study, Pullulan polysaccharide (Pullulan) and chain extenders (ADR4468) were selected to improve the properties of PLA‐based films. The ratio of PLA/Pullulan/ADR4468 was optimized by studying the mechanical and barrier properties of films. Then isosorbide dioctate (SDO), a kind of bio‐based plasticizer, was synthesized and added into PLA/Pullulan (4 wt%)/ADR4468 (0.8 wt%) system to study the effect of SDO content on the properties of films. A film with 15 wt% SDO showed elongation at a break of 79.7% while retaining a tensile strength of 30.6 MPa. With 20 wt% SDO, water vapor permeability and oxygen permeability of PLA/Pullulan/ADR/SDO film were reduced by 12.7% (2.95 × 10−14 kg m/(m2 s Pa)) and by 20.6% (1.95 × 10−3 cm3 m/ (m2 d Pa)), respectively, compared with that of PLA/Pullulan/ADR films. This study fills the research gap between PLA and Pullulan blends, broadens the application scenarios of new bio‐based plasticizers, and provides a method for improving the toughness and barrier properties of PLA. The films prepared in this study have potential applications in the green‐packaging field.Highlights The synthesis and characterization of isosorbide dioctate. The modified compatibility of PLA and Pullulan by ADR 4468. The optimization of the content of PLA/Pullulan/ADR 4468 film. The improvement of toughness and barrier properties of film by SDO.

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Food-safe glycidyl-free chain extenders for polylactides

Abstract: Glycidyl-based chain extenders are broadly used as processing aids to enhance the physical properties of polyesters, but glycidyl-containing compounds have severe toxicity concerns. Reported herein are glycidyl-free chain extenders produced...

Cited by 5 publications

References 40 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

Strategy to Antibacterial, High-Mechanical, and Degradable Polylactic Acid/Chitosan Composite Film through Reactive Compatibilization via Epoxy Chain Extender

Enhancement of toughness and gas barrier properties of PLA‐based films through bio‐based isosorbide dioctate: Synthesis, characterization, and application

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