Quantification of Irgafos P-168 and Degradative Profile in Samples of a Polypropylene/Polyethylene Composite Using Microwave, Ultrasound and Soxhlet Extraction Techniques
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Date
2024-04-21
Authors
Hernandez Fernandez, Joaquin
Pérez Mendoza, Jaime
Ortega-Toro, Rodrigo
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Abstract
In polypropylene/polyethylene composite (C-PP/PE) production, stabilizing additives
such as Irgafos P-168 are essential as antioxidant agents. In this study, an investigation was carried out
that covers different solid–liquid extraction methods (Soxhlet, ultrasound, and microwaves); various
variables were evaluated, such as temperature, extraction time, the choice of solvents, and the type
of C-PP/PE used, and the gas chromatography coupled to mass spectrometry (GC-MS) technique
was used to quantify the presence of Irgafos P-168 in the C-PP/PE samples. The results revealed that
microwave extraction was the most effective in recovering Irgafos P-168. A recovery of 96.7% was
achieved when using dichloromethane as a solvent, and 92.83% was achieved when using limonene
as a solvent. The ultrasound technique recovered 91.74% using dichloromethane and 89.71% using
limonene. The Soxhlet extraction method showed the lowest recovery percentages of 57.39% using
dichloromethane as a solvent and 55.76% with limonene, especially when the C-PP/PE was in the
form of pellets. The degradation products that obtained the highest degradation percentages were
Bis (di-test-butyl phenyl) phosphate and Mono (di-test-butyl phenyl) phosphate using the microwave
method with dichloromethane as a solvent and PP in film. Finally, the possible mechanisms for
forming the degradation compounds of Irgafos P-168 were postulated
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Hernández-Fernández, J.; Pérez-Mendoza, J.; Ortega-Toro, R. Quantification of Irgafos P-168 and Degradative Profile in Samples of a Polypropylene/Polyethylene Composite Using Microwave, Ultrasound and Soxhlet Extraction Techniques. J. Compos. Sci. 2024, 8, 156. https://doi.org/10.3390/jcs8040156