Počet záznamů: 1

Structure, mechanical properties and biodegradability of PCL/Starch blends

  1. 1.
    0358894 - UMCH-V 2012 RIV PL eng M - Část monografie knihy
    Šárka, E. - Synytsya, A. - Kruliš, Zdeněk - Kotek, Jiří - Růžek, L. - Bubník, Z. - Růžková, M.
    Structure, mechanical properties and biodegradability of PCL/Starch blends.
    STARCH Recent Advances In Biopolymer Science And Technology. Kraków: Polish Society of Food Technologists', 2010 - (Fiedorowicz, M.; Bertoft, E.), s. 131-143. ISBN 978-83-932389-0-3
    Grant CEP: GA ČR GA525/09/0607
    Výzkumný záměr: CEZ:AV0Z40500505
    Klíčová slova: poly-(ε-caprolactone) (PCL) * B-starch * acetylated starch
    Kód oboru RIV: GM - Potravinářství

    Native or pre-gelatinized wheat starches (A and B types) or acetylated derivatives or native starch with degree of substitution DS of 1.5÷2.3 (10, 20, and 40 % m/m) were blended with poly-(ε-caprolactone) (PCL). Structure of the prepared films was analysed by FT-IR spectroscopy in comparison with the initial polymers. The following mechanical characteristics of the prepared films were derived from the stress-strain curves: Young modulus, yield stress, tensile strength, and strain at break. Water absorption of PCL/starch (6O/4O) films was determined according to ISO 62. The films containing native and pregelatinized starch degraded in compost totally during 1-2 months. Acetylation of starch molecules in the blends reduced the degradation rate. Chemical changes in the compost used for film exposition were measured.
    Trvalý link: http://hdl.handle.net/11104/0196807