Table 1 presents the anhydride content data of the PLA-g-
MA samples that were determined by titration. The
anhydride content in PLA-g-MA was found to increase as
the amount of the MA was varied from 2 to 20%. When an
excess amount of MA (20%) is used, the anhydride content
in the PLA-g-MAwas found to be 3.8%, because most of the
MA (flash point 102 8C, mp¼52 8C) sublime during extrusion
at 183 8C and vacuum drying at 130 8C for 24 h