Halloysite is commonly occuring in Poland a natural mineral which, due to its structure is very popular among researchers. First of all, the large number of sorption areas and their various selectivity makes the material capable of adsorbing the compounds of different nature at the same time. As a result, there is a lot of possible applications. In addition, ease of functionalization of the surface of the material increases its sorption capacity and makes its more attractive.
The process of obtaining low molecular weight C2-C4 olefins, as a result of thermal and thermocatalytic conversion of cottonseed oil was investigated. The total content of olefin gases obtained by the thermal conversion of cottonseed oil in the temperature range of 700-800°C is 57.2-65.2 wt. %. Thermocatalytic conversion of cottonseed oil on the natural halloysite nanotubes as a catalyst in the temperature range of 500-800 ° provides the total content of olefins 10.8-69.2 wt. with increased yield of propylene and butenes.
The results of the studies on the synthesis, mechanical and thermal properties of polypropylene composites with various amount of halloysite filler are presented. Halloysite (HNT) belongs to the silica type characterized by a two-layer 1:1 structure. This work was aimed to develop a method for the modification of halloysite in its prime use as a filler for polypropylene by extrusion. The composites contain 1, 3, 5 and 7 wt.% of HNT. The degree of crystallinity of the composites decrease with increasing halloysite content. The results confirm the expectations that composites of interesting physicochemical, mechanical and thermal properties can be obtained. The mechanical properties studied show that the filler modification method used leads to the synthesis of polymer composites of improved thermal and mechanical properties.
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