Achieving Balanced Stiffness and Toughness of Plasticized Polymer Via Integrating Plasticization and Stress Concentration-Induced Plastic Deformation

Published: Jan. 1, 2025

Stiff polymers are widely used but limited by the poor toughness since they prone to breakage and failure when subjected impact or collision. Adding plasticizer is a common toughening method will result in sharply decreased stiffness. Few researches have focused on theoretical study of achieving balanced stiffness plasticized polymers. Herein, we proposed that via integrating plasticization stress concentration-induced plastic deformation, poly(lactic acid) (PLA) with can be achieved incorporating moderate not best compatibility matrix. Moderate promote chain-segment movability while maintaining high stiffness, where deformability usually limited. Stress deformation impart good limitedly PLA, plentiful small-sized deformations required avoid premature development microcracks into macrocracks. The designed advance manipulating solubility parameter plasticizer. We envision this work enrich theories contribute industrial preparation toughness.

Language: Английский

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Mechanical Properties of Polylactic Acid Nanofiber Films Reinforced by Modified Cellulose Nanocrystals

Food Bioengineering, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

ABSTRACT In this study, the surface of cellulose nanocrystals was first modified with citric acid, and resultant (MCNC) were subsequently utilized as a reinforcement phase for polylactic acid (PLA). Findings indicated that MCNC interacted PLA through hydrogen bonding, resulting in improved thermal stability, mechanical properties, hydrophobicity nanofiber films. Specifically, degradation temperature, tensile strength, elongation at break, contact angle films increased by 19°C, 30.04%, 49.11%, 11.22°, respectively, 3% addition MCNC. Subsequently, utilizing PLA/MCNC base material kaempferol active ingredient, preliminary exploration into its potential an packaging carried out. When amount 10%, DPPH ABTS free radical scavenging ability film reached more than 90%, demonstrating application material. These results offer promising strategy effective dispersion CNC within matrices, thereby expanding applications field packaging.

Language: Английский

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Optimization of the ductile properties of poly(lactic acid) (PLA) using green citrate-based plasticizers and itaconic anhydride grafted PLA (PLA-g-IA)

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 142034 - 142034

Published: March 1, 2025

Language: Английский

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Eco-friendly additives for biodegradable polyesters: Recent progress in performance optimization and environmental impact reduction

Sustainable materials and technologies, Journal Year: 2025, Volume and Issue: unknown, P. e01395 - e01395

Published: April 1, 2025

Language: Английский

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