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The tanning industry aims at converting the raw hide or skin (a putrescible material) into leather. At each ton of raw hides results 200-250 kg leather, while the untanned solid waste as organic fractions is around 500-600 kg. According to the EU policies on Green and Circular Economy the Action Plan covers the whole cycle: from production and consumption to waste management and use of secondary raw materials. In contrast with the traditional, linear ?extract-transform-use-dispose? economy model, the circular mode...

The tanning industry aims at converting the raw hide or skin (a putrescible material) into leather. At each ton of raw hides results 200-250 kg leather, while the untanned solid waste as organic fractions is around 500-600 kg. According to the EU policies on Green and Circular Economy the Action Plan covers the whole cycle: from production and consumption to waste management and use of secondary raw materials. In contrast with the traditional, linear ?extract-transform-use-dispose? economy model, the circular mode...

In this paper, a PVC filled with a biodegradable polymer, such as polyhydroxybutyrate, was investigated. Polyhydroxybutyrate is a natural biopolymer, but its use limits its high cost. These polymeric composites were obtained by rolling. Thermal and thermomechanical properties of polymer composites based on PVC containing various amounts of polyhydroxybutyrate are studied. It has been determined by differential scanning calorimetry method that the glass transition temperature of PVC decreases with increasing percen...

In the current work, a series of poly(sodium acrylate)-co-acrylamide (polyNaA-co-AAm/pectin and polyNaA-co-AAm/bentonite) superabsorbent composites were prepared using pectin, bentonite, acrylamide and acrylic acid (AA) in the presence of N,N-methylenebisacrylamide (MBAAm) as cross-linker and a mixture of ammonium persulfate and TEMED as initiator. The structure and sorption capacity of the developed composites were characterized by Fourier transform infrared spectroscopy (FTIR), voltammetry and UV-visible spectro...

In order to reduce the negative impact of PVC on the environment, it is becoming popular to produce composite materials based on PVC filled with various natural fillers. For example, bentonite as filler in a polymer matrix can absorb volatile toxic components and accelerate the degradation of PVC. Also in this paper, natural polysaccharides pectin and starch are considered as fillers. Pectin and starch are also capable of accelerating biodegradation of PVC. Nevertheless, the thermal stability of the resulting poly...