Thermal Properties and Biodegradability Studies of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) |
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| Authors: | Longan Shang Qiang Fei Yan Hui Zhang Xian Zheng Wang Dai-Di Fan Ho Nam Chang |
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| Institution: | (1) School of Biotechnology and Chemical Engineering, Ningbo Institute of Technology, Zhejiang Univerisy, 315100 Ningbo, China;(2) Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;(3) Department of Chemical Engineering, Northwest University, 710069 Xi’an, China;(4) Department of Chemical and Biomolecular Engineering, Biochemical Engineering Lab, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea |
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| Abstract: | For investigating the relationship between thermal properties and biodegradability of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), several films of PHBV containing different polyhydroxyvalerate (HV) fractions were subjected to
degradation in different conditions for up to 49 days. Differential scanning calorimetry (DSC), thermogravimetry (TG), specimen
weight loss and scanning electron microscopy (SEM) were performed to characterize the thermal properties and enzymatic biodegradability
of PHBV. The experimental results suggest that the degradation rates of PHBV films increase with decreasing crystallinity;
the degradability of PHBV occurring from the surface is very significant under enzymatic hydrolysis; the crystallinity of
PHBV decreased with the increase of HV fraction in PHBV; and no decrease in molecular weight was observed in the partially-degraded
polymer. |
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