| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5202405 | Polymer Degradation and Stability | 2013 | 8 Pages |
Abstract
Poly(lactic acid) (PLA) was melt-blended with a bio-based oligomeric lactic acid (OLA) plasticizer at different concentrations between 15Â wt% and 25Â wt% in order to enhance PLA ductility and to get a fully biodegradable material with potential application in films manufacturing. OLA was an efficient plasticizer for PLA, as it caused a significant decrease on glass transition temperature (Tg) while improving considerably ductile properties. Only one Tg value was observed in all cases and no apparent phase separation was detected. Films obtained by compression moulding were stored during 3 months under ambient controlled conditions and thermal, mechanical, structural and oxygen barrier properties were studied in order to evaluate the stability of the PLA-OLA films over time. Blends with 20 and 25Â wt% OLA remained stable and compatible with PLA within the ageing period. Besides, PLA-20Â wt% OLA formulation was the only one which maintained its amorphous state with adequate thermal, mechanical and oxygen barrier properties for flexible films manufacturing.
Related Topics
Physical Sciences and Engineering
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Authors
Nuria Burgos, Verónica P. Martino, Alfonso Jiménez,