Thermal degradation of poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) in nitrogen and oxygen studied by thermogravimetric-Fourier transform infrared spectroscopy.
The thermal degradation behavior of poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (P(HB-co-HHx), HHx=12 mol%) has been studied under different environmental conditions by thermogravimetric analysis (TGA) Fourier transform infrared (FT-IR) spectroscopy. It is reported that at higher temperature (>400 degrees C) carbon dioxide and propene are formed from the decomposition product crotonic acid in a nitrogen atmosphere, whereas in an oxygen atmosphere propene oxidizes in a further step to carbon dioxide, carbon monoxide and hydrogen. It was also found that PHB and P(HB-co-HHx) have a similar thermal degradation mechanism. The analysis of the FT-IR-spectroscopic data was performed with 2D and perturbation-correlation moving-window 2D (PCMW2D) correlation spectroscopy.
Vogel
Christian
C
Department of Physical Chemistry, University of Duisburg-Essen, Schuetzenbahn 70, 45117 Essen, Germany.
Morita
Shigeaki
S
Sato
Harumi
H
Noda
Isao
I
Ozaki
Yukihiro
Y
Siesler
Heinz W
HW
D020155:3-Hydroxybutyric Acid / Q000737:chemistry / Q000378:metabolism*; D001273:Atmosphere Exposure Chambers; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002208:Caproates / Q000737:chemistry / Q000378:metabolism*; D006358:Hot Temperature; D008962:Models, Theoretical; D009584:Nitrogen; D010100:Oxygen; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry / Q000295:instrumentation* / Q000379:methods; D000094122:Polyhydroxybutyrates
D020155:3-Hydroxybutyric Acid; D002208:Caproates; D009584:Nitrogen; D010100:Oxygen; C115940:poly(3-hydroxybutyrate-co-3-hydroxyhexanoate); D000094122:Polyhydroxybutyrates