Characterization and ageing study of poly(lactic acid) films plasticized with oligomeric lactic acid
Poly(lactic acid) (PLA) was melt-blended with a bio-based oligomeric lactic acid (OLA) plasticizer at different concentrations between 15 wt% and 25 wt% in order to enhance PLA ductility and to get a fully biodegradable material with potential application in films manufacturing. OLA was an efficient...
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| Veröffentlicht in: | Polymer degradation and stability 2013-02, Vol.98 (2), p.651-658 |
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| container_title | Polymer degradation and stability |
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| creator | Burgos, Nuria Martino, Verónica P. Jiménez, Alfonso |
| description | Poly(lactic acid) (PLA) was melt-blended with a bio-based oligomeric lactic acid (OLA) plasticizer at different concentrations between 15 wt% and 25 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 25 wt% OLA remained stable and compatible with PLA within the ageing period. Besides, PLA–20 wt% OLA formulation was the only one which maintained its amorphous state with adequate thermal, mechanical and oxygen barrier properties for flexible films manufacturing. |
| doi_str_mv | 10.1016/j.polymdegradstab.2012.11.009 |
| format | Article |
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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 25 wt% OLA remained stable and compatible with PLA within the ageing period. 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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 25 wt% OLA remained stable and compatible with PLA within the ageing period. 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| identifier | ISSN: 0141-3910 |
| ispartof | Polymer degradation and stability, 2013-02, Vol.98 (2), p.651-658 |
| issn | 0141-3910 1873-2321 |
| language | eng |
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| source | Access via ScienceDirect (Elsevier) |
| subjects | Ageing Aging Applied sciences Barriers biodegradability Blends Compounding ingredients compression molding Exact sciences and technology glass transition temperature Lactic acid manufacturing Molding (process) Oligomeric lactic acid oxygen Physical properties Plasticization Plasticizers Poly(lactic acid) polylactic acid Polymer industry, paints, wood Properties and testing separation Stability Technology of polymers |
| title | Characterization and ageing study of poly(lactic acid) films plasticized with oligomeric lactic acid |
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