Morphological analysis of the films
Films with thicknesses of around 200 mm were obtained.
shows SEM micrographs of cryofractured surfaces of control (TPS)
and active films (TPS-RE5%, TPS-RE10% and TPS-RE20%). TPS films
showed an ordered and homogeneous structure (i.e. without pores
and cracks); while, in the active films some cracks were observed
on the fractured surfaces