Similar type of behavior was
observed by Mathew and Dufresne 2002 when studying
the moisture absorption of sorbitol plasticized thermoplastic
starch reinforced with cellulose nanowhiskers [35].
When sorbitol is used as the plasticizer, it is believed to restrict
the moisture uptake of thermoplastic starch more
than glycerol due to higher chain length and fewer end hydroxyl
groups [35]. Because sorbitol was also used as the