Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/25810
Title: Thermogravimetric analysis of poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
Authors: Li, SD
Yu, PH
Cheung, MK
Keywords: Poly(3-hydroxybutyrate)
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
Thermal degradation
Thermogravimetry
Issue Date: 2001
Publisher: John Wiley & Sons
Source: Journal of applied polymer science, 2001, v. 80, no. 12, p. 2237-2244 How to cite?
Journal: Journal of applied polymer science 
Abstract: The thermal degradation of poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-HV)] was studied using thermogravimetry (TG). In the thermal degradation of PHB, the temperature at the onset of weight loss (To) was derived by To = 0.97B + 259, where B represents the heating rate (°C/min). The temperature at which the weight loss rate was maximum (Tp) was Tp = 1.07B + 273, and the final temperature (Tf) at which degradation was completed was Tf = 1.10B + 280. The percentage of the weight loss at temperature Tp (Cp) was 69 ± 1% whereas the percentage of the weight loss at temperature Tf (Cf) was 96 ± 1%. In the thermal degradation of P(HB-HV) (7:3), To = 0.98B + 262, Tp = 1.00B + 278, and Tf = 1.12B + 285. The values of Cp and Cf were 62 ± 7 and 93 ± 1%, respectively. The derivative thermogravimetric (DTG) curves of PHB confirmed only one weight loss step change because the polymer mainly consisted of the HB monomer only. The DTG curves of P(HB-HV), however, suggested multiple weight loss step changes; this was probably due to the different evaporation rates of the two monomers. The incorporation of 10 and 30 mol % of the HV component into the polyester increased the various thermal temperatures (To, Tp, and Tf) by 7-12°C (measured at B = 20°C/min).
URI: http://hdl.handle.net/10397/25810
ISSN: 0021-8995
EISSN: 1097-4628
DOI: 10.1002/app.1327
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

27
Last Week
0
Last month
0
Citations as of Aug 21, 2017

WEB OF SCIENCETM
Citations

26
Last Week
0
Last month
0
Citations as of Aug 20, 2017

Page view(s)

31
Last Week
0
Last month
Checked on Aug 20, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.