Journal
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
Volume 26, Issue 1, Pages 58-64Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.pnsc.2016.01.007
Keywords
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV); Thermal depolymerization; Thermal degradation; Biopolymer; Polyhydroxyalkanoates(PHAs)
Funding
- Program for Changjiang Scholars and Innovative Research Team in University [T2011079, IRT1221]
- China Postdoctoral Science Foundation [2015M581498]
- Nature Science Foundation of Shanghai of China [13ZR1401700]
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Thermal degradation processes and decomposition mechanisms of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) were investigated by using thermal gravity analysis(TGA), Gel permeation chromatography (GPC), elemental analyzer, pyrolysis-gas chromatography-mass spectrometry (PyGC-MS) and H-1 nuclear magnetic resonance (H-1 NMR). The degradation activation energy was calculated via the dependence of residual mass on isothermal temperature. H-1 NMR and PyGC-MS were used to investigate the chemical structure and component proportion of volatile gases and degradation residues which were produced by thermal decomposition, and to infer the process of macromolecular chain scission. Besides, the influence of the factors, such as outfield atmosphere, residual metal ions, on the degradation behaviors of PHBV was also studied. Finally, the PHBV thermal decomposition mechanisms were speculated on the basis of the degradation behaviors of molecular and chemical structure. (C) 2016 The Authors. Production and hosting by Elsevier B.V. on behalf of Chinese Materials Research Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.ordlicenses/hy-nc-nd/4.0/).
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