Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/0141-3910(95)00221-9
Title (Primary) Thermal decomposition of biodegradable polyesters—I: Poly(β-hydroxybutyric acid)
Author Kopinke, F.-D.; Remmler, M.; Mackenzie, K.
Journal Polymer Degradation and Stability
Year 1996
Department TUCHEM; SAN
Volume 52
Issue 1
Page From 25
Page To 38
Language englisch
Abstract The thermal decomposition of the biologically degradable polymer poly(β-hydroxybutyric acid) (PHB) was investigated by means of several thermoanalytical techniques: thermogravimetry, differential scanning calorimetry. time resolved pyrolysis-MS and pyrolysis-GC/MS. The results conform with reaction mechanisms proposed in the literature. The dominant reaction pathway is a stereoselective cis-elimination giving rise to the formation of trans-crotonic acid and its oligomers. Crude PHB embedded in the original biomass is significantly less stable (Tmax = 235 °C) than the purified polymer (Tmax = 290 °C). An apparent activation energy of EΛ = 235 kJ · mol−1 was derived from DSC measurements. The data from dynamic thermogravimetric and pyrolysis-MS experiments are not consistent with first order random cleavage kinetics, as would be expected from the reaction mechanism. Thermogravimetry offers a convenient tool for analyzing quantitatively the PHB content of biomasses.
Persistent UFZ Identifier
Kopinke, F.-D., Remmler, M., Mackenzie, K. (1996):
Thermal decomposition of biodegradable polyesters—I: Poly(β-hydroxybutyric acid)
Polym. Degrad. Stabil. 52 (1), 25 - 38