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Comparative study of chemical, mechanical, thermal and barrier properties of poly(lactic acid) plasticized with epoxidized soybean oil and epoxidized palm oil


Citation

Tee, Yee Bond and A. Talib, Rosnita and Abdan, Khalina and Chin, Nyuk Ling and Kadir Basha, Roseliza and Md. Yunos, Khairul Faezah (2016) Comparative study of chemical, mechanical, thermal and barrier properties of poly(lactic acid) plasticized with epoxidized soybean oil and epoxidized palm oil. BioResources, 11 (1). pp. 1518-1540. ISSN 1930-2126

Abstract

To investigate epoxidized palm oil’s (EPO) potential as plasticizer for poly (lactic acid) (PLA), its plasticizing effect was compared with commercialized epoxidized soybean oil (ESO). The plasticizers were respectively melt-compounded into PLA at 3, 5, 10, and 15 wt.%. As it was aimed for the blends to be characterized towards packaging appropriate for food products, they were hot-pressed into ~0.3-mm sheets, which is the approximate thickness of clamshell packaging. Fourier transform infrared spectroscopy (FTIR) confirmed the plasticizers’ compatibility with PLA. At similar loadings, EPO was superior in reinforcing elongation at break (EAB), thermal, and barrier properties of PLA. The ductility of PLA was notably improved to 50.0% with addition of 3 wt.% of EPO. From thermogravimetric analysis (TGA), PLA/EPO5 improved PLA’s thermal stability, while all PLA/ESO blends reported reduced thermal stability. From differential scanning calorimetry (DSC), the increase in crystallinity and the shifts in enthalpy of fusions in all plasticized blends denoted facilitation of PLA to form thermally stable α-form crystals. The addition of EPO enabled PLA to become highly impermeable to oxygen, which can extend its potential in packaging extensive range of oxygen sensitive food.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Halal Products Research Institute
Institute of Tropical Forestry and Forest Products
Publisher: North Carolina State University
Keywords: Poly(lactic acid); Epoxidized oil; Plasticizer; Mechanical properties; Thermal properties; Barrier properties
Depositing User: Mohd Hafiz Che Mahasan
Date Deposited: 06 Nov 2017 15:06
Last Modified: 20 Mar 2018 00:43
URI: http://psasir.upm.edu.my/id/eprint/55327
Statistic Details: View Download Statistic

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