Waste Polyethylene Terephthalate Packaging Materials in Developing countries – Sources, Adverse Effects, and Management

Elehinafe, Francis B.; Kolawole, Timileyin; Beture, Oshiokheme; Oni, Babalola Aisosa

doi:10.12912/27197050/132222

Cited by 2 publications

(3 citation statements)

References 17 publications

(20 reference statements)

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“…3 It is used as a packaging material for water and soft drinks in beverage industries because of its high gas barrier properties. 3 Additionally, PET has a high glass transition temperature (78°C), 4 melting temperature (245-265°C), 5 and excellent optical clarity when compared with glass. Despite these outstanding properties of PET and its wide appeal, the non-degradability of waste PET products has caused serious environmental pollution, and also their presence within our agricultural land has considerably reduced the fertility of the soil, thus, putting pressure on the food chain.…”

Section: Introductionmentioning

confidence: 99%

“…It has been adjudged the second most widely used plastic in bottles and other rigid and semi-rigid packaging containers after high-density polyethylene (HDPE). 3 It is used as a packaging material for water and soft drinks in beverage industries because of its high gas barrier properties. 3 Additionally, PET has a high glass transition temperature (78°C), 4 melting temperature (245-265°C), 5 and excellent optical clarity when compared with glass.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of epoxy concentrations on thermo-mechanical properties of kenaf fiber – recycled poly (ethylene terephthalate) composites

Owen

Achukwu

Akil

et al. 2022

Journal of Industrial Textiles

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The effect of different concentrations of epoxy surface coating treatment on the thermal and mechanical properties of kenaf fiber reinforced recycled poly (ethylene terephthalate) (RPET) composites was studied. Silane-treated kenaf fibers (SKF) were epoxy-coated with optimized coating concentrations (in the ratios of 1:4, 1:5, and 1:6 epoxy to acetone solutions) to improve the thermal degradation/decomposition resistance and interfacial bonding with RPET matrix. The different epoxy coated-silane treated kenaf fibers 1:4 ESKF, 1:5 ESKF, and 1:6 ESKF were compounded with RPET at an optimized temperature of 240°C, and their constituents’ composites KF/RPET, 1:4 ESKF/RPET, 1:5 ESKF/RPET, and 1:6 ESKF/RPET were subjected to thermal, mechanical and microstructural investigation. The obtained results showed some remarkable effects of epoxy concentrations on the chemical and surface structures of the treated fibers. Thermal properties of both ESKF and ESKF/RPET composites were more stable and improved with different concentrations of epoxy treatment compared to the untreated counterparts. 1:4 ESKF and 1:5 ESKF were the most thermally stable with onset degradation and DTG decomposition temperatures of 331.6°C and 381.7°C, and 324.0°C and 388.7°C respectively. Mechanical properties of the epoxy-coated composites were higher and further improved with epoxy concentrations and fiber loadings compared to uncoated composites. Hence, the epoxy concentration of 1:4 gave the maximum tensile and impact properties, and at 10 wt. % fiber loading within the lower loading regions, followed by 1:5 with outstanding flexural properties. The coated-treated composites showed strong fiber/matrix bonding with no evidence of fiber decomposition compared to the untreated composites with poor fiber/matrix interaction. The current research findings are original and valid for improving the thermal degradation resistance and stability of natural fibers, and the mechanical properties of natural fiber reinforced engineering thermoplastic composites. The epoxy coated – silane-treated textile kenaf fibers reinforced with recycled PET composites have the potentials to be utilized in high-temperature industrial and engineering applications.

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