Enhancing the Mechanical Strength and Thermal Stability of Polylactic Acid (PLA) with the Addition of Epoxidized Waste Cooking Oil (EWCO)-Reference-Cited by-同舟云学术

Enhancing the Mechanical Strength and Thermal Stability of Polylactic Acid (PLA) with the Addition of Epoxidized Waste Cooking Oil (EWCO)

Published:2024-07-30 Issue:3 Volume:32 Page:80-95
ISSN:2231-8526
Container-title:Pertanika Journal of Science and Technology
language:en
Short-container-title:JST

Author:

Norhazlin Nur Batrisyia,Razak Nurul Hanim,Omar Anis Ainaa,Mohd Hanafi Mohd Hafidzal,Mat Desa Asmah

Abstract

Polylactic Acid (PLA) comes from renewable resources, has a reasonable biodegradability rate, and is used in biomedical, food packaging, textiles, and agricultural applications. PLA offers high mechanical strength and the ability to compost, similar to polyethylene terephthalate (PET) and nylon. However, the brittleness of PLA has always limited its usage. Therefore, bio-based plasticizers in the biopolymer matrices can increase flexibility (elasticity), durability, and workability. This study aims to determine the optimal blending ratio for the PLA blended with epoxidized waste cooking oil (EWCO) to enhance the mechanical and thermal properties of PLA/EWCO. The mechanical strength test consists of the hardness test (N/mm2), flexural strength (MPa), and impact energy (kJ/m) adopted to evaluate the plasticizing characteristics. The thermal stability analysis involves glass transition temperature (Tg) (°C), cold-crystallization temperature (Tcc) (°C) and melting temperature (Tm) (°C). The blending ratio is 97.5PLA/2.5EWCO, 95PLA/5EWCO, 92.5PLA/7.5EWCO and 90PLA/10EWCO. As a result, 97.5:2.5 of PLA/EWCO reduces intermolecular interactions by stimulating more free volume in biopolymer chains’ mobility and enhancing the flexibility and elasticity of the PLA blends. Ultimately, the brittleness of PLA decreased with increasing EWCO bio-based plasticizer.

Publisher

Universiti Putra Malaysia

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