A review on degradation mechanisms of polylactic acid: Hydrolytic, photodegradative, microbial, and enzymatic degradation

By N. F. Zaaba, M. Jaafar. 2020

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Towards Controlled Degradation of Poly(lactic) Acid in Technical Applications (2021, background): “Enzymatic involvement can produce pores and fragmentation, making more polymer regions accessible to the enzymes [55] The activity of the enzymes depolymerizing the PLA depends on the following factors: pH values, temperatures, chain stereochemistry, and material crystallinity [87].”
Advances in barrier coatings and film technologies for achieving sustainable packaging of food products – A review (2021, background): “PLA is stable at room temperature, but it is easy to degrade rapidly in environments that are moderately high temperature, acid-base, or microbial, and finally generate CO2 and water molecules that are innocuous to the environment (Zaaba & Jaafar, 2020).”