Biodegradability and Mechanical Properties of Poly(vinyl alcohol)-Based Blend Plastics Prepared Through Extrusion Method
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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.
KeywordsPoly(vinyl alcohol) Xanthan Gellan Biodegradation
This work was supported by the Grant Agency of the Czech Republic (GACR P108/10/0200) and also with support from Operational Program Research and Development for Innovations co-funded by the European Regional Development Fund (ERDF) and the national budget of the Czech Republic, within the framework of the project Centre of Polymer Systems (reg. Number: CZ.1.05/2.1.00/03.0111).
- 14.Slovak Standard STN ISO 527-2 (1998) Plastics: determination of tensile properties. Slovak Standards Institute, Bratislava, Slovak RepublicGoogle Scholar
- 15.ISO 11734 (1998) Water quality: evaluation of the ultimate anaerobic biodegradability of organic compounds in digested sludge. Method by measurement of the biogas production. International Organization for Standardization, Geneva, SwitzerlandGoogle Scholar
- 16.Czech Standard EN ISO 9439 (2001) Water quality: evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium. Carbon dioxide evolution test. Czech Institute for Standardization, Praha Czech RepublicGoogle Scholar
- 17.Czech Standard EN ISO 14855-2 (2008) Determination of the ultimate aerobic biodegradability and desintegration of plastic materials under controlled composting conditions: method by analysis of evolved carbon dioxide. Czech Institute for Standardization, Praha Czech RepublicGoogle Scholar
- 18.ISO 17556 (2003) Plastics: determination of the ultimate aerobic biodegradability in soil by measuring the oxygen demand in a respirometer or the amount of carbon dioxide evolved. International Organization for Standardization, Geneva, SwitzerlandGoogle Scholar
- 22.Noor ISM, Majid SR, Arof AK, Djurado D, Claro Neto S, Pawlicka A (2012) Solid State Ion (in press)Google Scholar