Abstract
Poly(lactide- co-glycolide) (PLGA) has been extensively investigated for controlled drug release. Because they undergo bulk degradation, they do not allow for a good controlled-release of drugs. The objective of this study is therefore to understand if a multi-layer-cum-irradiation technique would elicit surface erosion from PLGA polymers. A linear loss of mass and film thinning from PLGA films were observed. Also, the erosion of the top layer, of this multi-layered structure, accelerates degradation of the underlying layers. It is this effect that results in the observed pseudo-surface erosion for irradiated multi-layered PLGA.
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