Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/0141-3910(96)00102-4 |
| Title (Primary) | Thermal decomposition of biodegradable polyesters—II. Poly(lactic acid) |
| Author | Kopinke, F.-D.; Remmler, M.; Mackenzie, K.
; Möder, M.; Wachsen, O. |
| Source Titel | Polymer Degradation and Stability |
| Year | 1996 |
| Department | TUCHEM; ANA; SAN |
| Volume | 53 |
| Issue | 3 |
| Page From | 329 |
| Page To | 342 |
| Language | englisch |
| Abstract | The thermal decomposition of the biologically degradable polymer poly(lactic acid) (PLA) was investigated by means of several thermoanalytical techniques: thermogravimetry, differential scanning calorimetry, time resolved pyrolysis-MS and pyrolysis-GC/MS. The results mainly confirm reaction mechanisms proposed in the literature. The dominant reaction pathway is an intramolecular transesterification for pure PLA (Tmax = 360 °C), giving rise to the formation of cyclic oligomers. In addition, acrylic acid from cis-elimination as well as carbon oxides and acetaldehyde from fragmentation reactions were detected. PLA samples contaminated with residual Sn from the polymerization process show a preceding selective depolymerization step (Tmax = 300 °C) which produces lactide exclusively. The GC analysis of the oligomers gives insight into the stereochemistry of the original polymer chain with respect to the configuration of the asymmetric C atoms, as well as into the stereochemistry of decomposition reactions. Other experimental findings, which do not fit the proposed reaction mechanisms, are also discussed. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=24271 |
| Kopinke, F.-D., Remmler, M., Mackenzie, K., Möder, M., Wachsen, O. (1996): Thermal decomposition of biodegradable polyesters—II. Poly(lactic acid) Polym. Degrad. Stabil. 53 (3), 329 - 342 10.1016/0141-3910(96)00102-4 |
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