Abstract
The swelling and mechanical behavior of untreated leather waste particles (buffing dust, BD) in natural rubber have been studied. Mechanical and swelling properties of the natural rubber (NR) composites containing the buffing dust have been discussed. The properties of the composites were found to increase with the increase in filler loading. Polymer composites based on leather wastes as fillers are reported to be useful for many applications such as in construction materials, automobile interior moldings, heat and sound insulating boards, shoe soles, flooring materials and moldings with good anti-static properties, air permeability, and good appearances.
Highlights
In natural rubber compounding, fillers are major additives
Vulcanisates containing leather particles have exhibited significant improvements in mechanical properties when compared to the natural rubber vulcanisate that does not contain any filler
The result on modulus showed that the modulus of the natural rubber (NR) vulcanizates increases as the filler content in the filled NR vulcanisates was increased
Summary
Fillers are major additives. Incorporation of fillers into natural rubber matrix enhances properties such as tensile strength, modulus, tear strength, abrasion resistance, stiffness and processibility. When waste leather fibres are added to elastomers, it could function as short fibre reinforcement for the matrix provided the inherent fibrous nature of the former is retained during processing. Since processing of elastomers is carried out relatively at high temperatures, retention of the fibrous nature in the leather under such conditions, is very difficult It is, prudent to use and consider the leather waste in the particulate form and study its effectiveness either as filler or as a processing aid in elastomeric formulations. Natural rubber- scrap rubber vulcanisates containing untreated leather particles reduces the vulcanization characteristics and mechanical properties of the compound, but improves the incorporation and higher amount of loading of scrap rubber [9]. Waste chrome leather shavings obtained from a local tannery usually contains 2.5% chromium and 11.21% nitrogen
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