NDLI: Degradation of Poly(l-Lactic Acid) and Bio-Composites by Alkaline Medium Under Various Temperatures

Content Provider	Springer Nature Link
Author	Tisserat, B. Finkenstadt, V. L.
Copyright Year	2011
Abstract	Ribbons of poly(lactic acid) (PLA) and PLA containing 10 or 25% Osage Orange (OO) biocomposites of various sized heartwood particles were exposed to non-composting soil conditions either outdoors or in a greenhouse. No appreciable degradation was evident after 208 day treatments. An artificial alkaline degradation test system was developed to reduce the study time required to evaluate PLA compositional properties on degradation. Ribbons of PLA and PLA-OO biocomposites of various sized particles were subjected to hydrolysis in alkaline concentrations (0, 0.05, 0.1, 0.15, and 0.25 M NaOH) under various temperatures (15, 20, 25, 30, 35, 40, and 80 °C) up to 56 days. Higher concentrations of NaOH (e.g., 0.25 M) caused more dramatic and rapid deterioration of PLA and PLA-OO composites than lower NaOH concentrations for all temperatures tested. Incubation in either the low temperatures (15 and 20 °C) or the highest temperature (80 °C) was consistently more effective in PLA-OO degradation than employing 35 or 40 °C. Several alkaline and temperature test combinations are offered to study accelerated PLA degradation. Ribbons immersed in NaOH were examined with the scanning electron microscope to analyze for morphological alterations.
Starting Page	766
Ending Page	775
Page Count	10
File Format	PDF
ISSN	15662543
Journal	Journal of Polymers and the Environment
Volume Number	19
Issue Number	3
e-ISSN	15728900
Language	English
Publisher	Springer US
Publisher Date	2011-06-25
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Poly(lactide) Hydrolysis Degradation Erosion Alkaline solution Polymer Sciences
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Environmental Engineering Polymers and Plastics

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