Nanocomposite film preparation
Three series of nanocomposites were developed. In the first
series, a commercially modified organoclay (Cloisite 25A) was used
at different clay contents in PDLLA. Melt intercalation was performed
using a co-rotating twin screw microextruder/compounder
(MiniLab, ThermoHaake). The compounding was conducted at
250rpm and 130 ◦C for 25 min. Constant nitrogen flow was used
during nanocomposite preparation in order to prevent thermal
decomposition of the PDLLA matrix.