Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27370
Title: Thermal degradation of poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) as studied by TG, TG-FTIR, and Py-GC/MS
Authors: Li, SD
He, JD
Yu, PH
Cheung, MK
Keywords: Poly(3-hydroxybutyrate)
Poly(3-hydroxybutyrate-c o-3-hydroxyvalerate)
Py-GC/MS
TG
TG-FTIR
Thermal degradation
Thermal stability
Issue Date: 2003
Publisher: John Wiley & Sons
Source: Journal of applied polymer science, 2003, v. 89, no. 6, p. 1530-1536 How to cite?
Journal: Journal of applied polymer science 
Abstract: The thermal degradation kinetics of poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [poly(HB-HV)] under nitrogen was studied by thermogravimetry (TG). The results show that the thermal degradation temperatures (To, Tp, and Tf) increased with an increasing heating rate (B). Poly(HB-HV) was thermally more stable than PHB because its thermal degradation temperatures, To(0), Tp(0), and Tf(0) - determined by extrapolation to B = 0°C/mm - increased by 13°C-15°C over those of PHB. The thermal degradation mechanism of PHB and poly(HB-HV) under nitrogen were investigated with TG-FTIR and Py-GC/MS. The results show that the degradation products of PHB are mainly propene, 2-butenoic acid, propenyl-2-butenoate and butyric-2-butenoate; whereas, those of poly(HB-HV) are mainly propene, 2-butenoic acid, 2-pentenoic acid, propenyl-2-butenoate, propenyl-2-pentenoate, butyric-2-butenoate, pentanoic-2-pentenoate, and CO2. The degradation is probably initiated from the chain scission of the ester linkage.
URI: http://hdl.handle.net/10397/27370
ISSN: 0021-8995
EISSN: 1097-4628
DOI: 10.1002/app.12249
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