Properties and morphology of poly(L-lactide). 4. Effects of structural parameters on long-term hydrolysis of poly(L-lactide) in phosphate-buffered solution

By H. Tsuji, Y. Ikada. 2000

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Abiotic and biotic environmental degradation of the bioplastic polymer poly(lactic acid): A review (2017, background): “Crystalline regions within PLA hydrolyse much more slowly than the amorphous regions as water diffuses more readily into the less organized amorphous regions compared to the more ordered crystalline regions, causing greater rates of hydrolysis and increased susceptibility to biodegradation [16,20,25”
Hydrolysis and Biodegradation of Poly(lactic acid) (2017, background): “Other papers [18,70] reported an accelerated hydrolysis in neutral media with increasing polymer crystallinity for PLLA [11,71] and PLLA/PDLA blends [72].”
Polymer biodegradation: mechanisms and estimation techniques. (2008, background): “Hydrolysis is another way by which polymers can undergo chemical degradation (Muller et al., 1998; Tsuji and Ikada, 2000; Yi et al., 2004).”
Lifetime prediction of biodegradable polymers (2017, background): “In a number of studies, it was observed that at physiological temperatures the Young’s modulus initially decreased very slowly on hydrolysis before then sharply dropping [171-175].”