A weak endothermic peak can be observed in the thermogram of the starch/CA film which may be caused by the melting of the residual CA, since the melt point of the pure anhydrous CA is ∼159 °C. For starch/CA/CMC polymer blend films, the temperature position of the melting peak decreased from 223.1 °C to 191.7 °C as CMC content increased from 0 to 10% W/W starch,