Biodegradability of poly(3-hydroxybutyrate) film grafted with vinyl acetate: Effect of grafting and saponification |
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| Institution: | 1. Department of Immunology, Institute for Biological Research “Siniša Stanković”, University of Belgrade, Serbia;2. Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia;3. OncoNox, Copenhagen, Denmark;4. Department of Bio-medical Sciences, University of Catania, Italy;1. Department of Marine-Bio Convergence Science, Specialized Graduate School Science & Technology Convergence, Pukyong National University, 365 Sinseon-ro, Nam-gu, Busan 48547, Republic of Korea;2. Division of Biology and Ocean Sciences, Inha University, Yong-Hyun-Dong, Nam-Gu, Incheon 22212, Republic of Korea;3. Marine Biotechnology Research Division, Korea Institute of Ocean Science & Technology, PO Box 29, Ansan 15627, Republic of Korea;4. Department of LED Convergence Engineering, Specialized Graduate School Science & Technology Convergence, Pukyong National University, 365 Sinseon-ro, Nam-gu, Busan 48547, Republic of Korea |
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| Abstract: | Radiation-induced graft polymerization of vinyl acetate (VAc) onto poly(3-hydroxybutyrate) (PHB) film was carried out. At a degree of grafting higher than 5%, the grafted films (PHB-g-VAc) completely lost the enzymatic degradability that is characteristic of PHB due to the grafted VAc covering the surface of the PHB film. However, the biodegradability of the PHB-g-VAc films was recovered when the films were saponified in alkali solution under optimum conditions. Graft chains of the PHB-g-VAc film reacted selectively to become biodegradable polyvinyl alcohol (PVA). The biodegradability of the saponified PHB-g-VAc film increased rapidly with time. |
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