of anhydride formation is induced by addition of nanofillers,
suggesting a radical mechanism on the basis of a hydroperoxide
decomposition catalytic effect of the transition metals present
in the nanofiller as impurities. The photooxidation conducted
on sample addicted with Fe(III) confirms the role of transition
metals on PLA photooxidation. The influence of nanofillers must
therefore be taken into account for durable outdoor applications
of PLA nanocomposites. On the other hand, when the environmental
biodegradability is desired the addition of nanofillers
could help in accelerate PLA decomposition.