Journal
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
Volume 131, Issue 1-3, Pages 774-785Publisher
SPRINGER
DOI: 10.1385/ABAB:131:1:774
Keywords
PLA; biodegradable polymers; bio-based polymers; polylactic acid; diffusion; hydrolysis
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Management of moisture penetration and hydrolytic degradation of polylactide (PLA) is extremely important during the manufacturing, shipping, storage, and end-use of PLA products. Moisture transport, crystallization, and degradation in PLA have been measured through a variety of experimental techniques including size-exclusion chromatography, differential scanning calorimetry, and X-ray diffraction. Quartz crystal microbalance and dynamic vapor sorption experiments have also been used to measure moisture sorption isotherms in PLA films with varying crystallinity. A surprising result is that, within the accuracy of the experiments, crystalline and amorphous PLA films exhibit identical sorption isotherms.
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