期刊
POLYMERS
卷 14, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/polym14020260
关键词
drawn polymer fibers; nanocomposites; carbon nanotubes; talc; wollastonite; attapulgite; antioxidant; compatibilizer
资金
- European Regional Development Fund of the European Union
- Greek national funds through the Operational Program Competitiveness, Entrepreneurship and Innovation [T6YBP-00035]
Isotactic polypropylene composite drawn fibers were prepared using different fillers as reinforcement agents. It was found that the use of ultrafine talc particles yields better results, while needle-like fillers such as wollastonite and single-wall carbon nanotubes also showed improved performance.
Isotactic polypropylene (PP) composite drawn fibers were prepared using melt extrusion and high-temperature solid-state drawing at a draw ratio of 7. Five different fillers were used as reinforcement agents (microtalc, ultrafine talc, wollastonite, attapulgite and single-wall carbon nanotubes). In all the prepared samples, antioxidant was added, while all samples were prepared with and without using PP grafted with maleic anhydride as compatibilizer. Material characterization was performed by tensile tests, differential scanning calorimetry, thermogravimetric analysis and Fourier transform infrared spectroscopy. Attapulgite composite fibers exhibited poor results in terms of tensile strength and thermal stability. The use of ultrafine talc particles yields better results, in terms of thermal stability and tensile strength, compared to microtalc. Better results were observed using needle-like fillers, such as wollastonite and single-wall carbon nanotubes, since, as was previously observed, high aspect ratio particles tend to align during the drawing process and, thus, contribute to a more symmetrical distribution of stresses. Competitive and synergistic effects were recognized to occur among the additives and fillers, such as the antioxidant effect being enhanced by the addition of the compatibilizer, while the antioxidant itself acts as a compatibilizing agent.
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