3.1. DSC endotherms of the films
Table 2 reports the thermal characteristics of the pure
components and the films. Pure Gellan has a glass transition
much below room temperature (212.2 8C), while the blends
show a shift in glass transition to higher temperatures. Fig. 1
shows the DSC melt thermograms for pure Gellan, pure PVA
and the Gellan and PVA blends. The thermal analysis of
Gellan/PVA blends by DSC showed that the melting
temperatures (Tm) shift due to the interaction of the two
polymers.