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Authors
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Tayouri, M.I. ; Mousavi, S.R. ; Estaji, S. ; Mahand, S.N. ; Jahanmardi, R. ; Arjmand, M. ; Arnhold, K. ; Khonakdar, H.A.
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Title
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Polystyrene/polyolefin elastomer/halloysite nanotubes blend nanocomposites: Morphology-thermal degradation kinetics relationship
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Date
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01.07.2022
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Number
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61004
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Abstract
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Polystyrene/polyolefin elastomer (PS/POE) (90/10 and 80/20·wt/wt) blends containing 1, 3, and 5 phr halloysite nanotubes (HNTs) in the presence and absence of a compatibilizer (polypropylene-graft-maleic anhydride) were prepared using the melt-mixing technique. Scanning electron microscopic studies confirmed a matrix-droplet morphology. Energy dispersive spectroscopy (EDS) mapping indicated that the blends containing 5 phr HNTs possessed aggregates, while no agglomeration was observed after incorporating 5 phr compatibilizer. Thermal stability and thermal degradation kinetics were investigated using thermogravimetry analysis (TGA). The results demonstrated that the PS/POE blend (90/10) containing 5 phr HNTs and compatibilizer (90/10/5/5) has the best thermal stability. Different methods such as Friedman, Flynn-Ozawa-Wall, and Kissinger-Akahira-Sunose were applied to calculate the degradation activation energy. The 90/10/5/5 nanocomposite exhibited the highest degradation activation energy, indicating that this sample is more difficult to degrade thermally than other samples. A correlation was obtained between the activation energy and the intensity of the TGA-fourier-transform infrared spectroscopy (TGA/FTIR) peaks of the evolved products. The Criado method was used to determine the changes in the thermal degradation mechanism of the samples.
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Publisher
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Polymers for Advanced Technologies
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Wikidata
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Citation
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Polymers for Advanced Technologies 33 (2022) 2149-2165
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DOI
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https://doi.org/10.1002/PAT.5664
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