Biodegradability and Mechanical Properties of Poly(vinyl alcohol)-Based Blend Plastics Prepared Through Extrusion Method |
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Authors: | Martina Kopčilová Jitka Hubáčková Jan Růžička Marie Dvořáčková Markéta Julinová Marek Koutný Miroslava Tomalová Pavol Alexy Peter Bugaj Jaroslav Filip |
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Institution: | 1. Department of Environmental Engineering, Faculty of Technology, Tomas Bata University in Zlín, TGM Square 275, 762 72, Zlín, Czech Republic 2. Centre of Polymer Systems, TGM Sqr. 5555, 760 01, Zlín, Czech Republic 3. Department of Plastics and Rubber, Institute of Polymer Materials, Slovak University of Technology, Radlinského 9, 812 37, Bratislava 1, Slovak Republic
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Abstract: | Plastic blend materials consisting of poly(vinyl alcohol), glycerol and xanthan or gellan were prepared through laboratory extrusion. Their base mechanical properties were compared with the properties of poly(vinyl alcohol) foil and their biodegradability in soil, compost and both activated and anaerobic sludge were assessed. In samples with lower polysaccharide content (10–21 %w/w) the tensile strength of 15–20 MPa was found; the elongation at break of all blends was relatively close to the parameter of poly(vinyl alcohol) foil. The biodegradability levels of the blends tested corresponded to the content of natural components, and the mineralization of the samples with the highest carbohydrate proportion (42 %) reached 50–78 %, depending on the type of the environment. Complete biodegradation of all samples occurred in activated sludge. |
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