Granitic quarry waste as a dual functional filler for high density polyethylene‐based composites: Mechanical and microwave absorbing properties

Luanna C. R. Moura; Bluma G. Soares; Tamara IndrusiakReiner NeumannLuís Marcelo Tavares

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Granitic quarry waste as a dual functional filler for high density polyethylene‐based composites: Mechanical and microwave absorbing properties

机译：Granitic quarry waste as a dual functional filler for high density polyethylene‐based composites: Mechanical and microwave absorbing properties

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Abstract Cost‐effective polymeric composites were successfully prepared by melt blending granitic quarry waste (GQW) with high‐density polyethylene (HDPE). The GQW is a waste generated during the production of manufacture fine aggregates (MFA) from crushed gneiss rock and contains significant amount of mica with iron in its structure. Different sieving and milling procedures were employed. The materials were characterized by mechanical and dynamic‐mechanical properties and scanning electron microscopy. Moreover, the influence of the GQW on the microwave absorbing properties in the X‐band frequency range was investigated. The presence of mica and iron compound in the GQW provides a dual function to the filler: toughening agent with microwave absorbing capacity. Indeed, the addition of 5 wt% of GQW previously sieved and milled by dry or wet‐grinding approach resulted in composites with outstanding toughness, modulus and elongation at break. Simulated RL studies revealed electro‐magnetic attenuation of −25 dB at 8.7 GHz. Such successful use of a waste generated in the production of a concentrate (MFA) not only contributes to the economics of the quarrying operation, but also to its environmental sustainability, since it replaces disposal of this product, which could lead to dust emissions, given its fine size and low moisture content.

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《Journal of Applied Polymer Science》 |2022年第8期|n/a-n/a|共11页
作者
Luanna C. R. Moura; Bluma G. Soares; Tamara IndrusiakReiner NeumannLuís Marcelo Tavares;
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作者单位

Universidade Federal do Rio de Janeiro;

Centro Tecnológico do Exército (CTEx);

Centre for Mineral Technology (CETEM);

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原文格式 PDF
正文语种英语
中图分类高分子化合物工业（高聚物工业）;
关键词
applications; composites; dielectric properties; mechanical properties; polyolefins;

Granitic quarry waste as a dual functional filler for high density polyethylene‐based composites: Mechanical and microwave absorbing properties

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