Composites containing acetylated wheat B-starch for agriculture applications
E. Šárka, Z. Kruliš, J. Kotek, L. Růžek, K. Voříšek, J. Koláček, K. Hrušková, M. Růžková, O. Ekrthttps://doi.org/10.17221/287/2012-PSECitation:Šárka E., Kruliš Z., Kotek J., Růžek L., Voříšek K., Koláček J., Hrušková K., Růžková M., Ekrt O. (2012): Composites containing acetylated wheat B-starch for agriculture applications. Plant Soil Environ., 58: 354-359.
Native and acetylated B-starch was used in biodegradable films after blending with either poly-(ε-caprolactone) (PCL) or ethylene vinyl acetate copolymer (EVA). The following mechanical characteristics of prepared films were derived from the stress-strain curves: Young modulus, yield stress, stress-at-break and strain-at-break. Acetylation of starch molecules in the composites reduced the degradation rate in compost. Optical microscopy, combined with the image analysis system NIS-Elements completed with extended depth of focus (EDF) module, was used to study the PCL/starch and EVA/starch films surface morphology during composting. Parameters of the compost used for film exposition were measured.Keywords:
biodegradable plastic; polycaprolactone; ethylene vinyl acetate copolymer; image analysis; green waste compost