k] for the three plasticizers is various and presents an upward tendency in a sequence: GTA > DPGDB > GTB.
The elongation of PLA plasticized by GTA, DPGDB, and GTB significantly increase with plasticizer content, which is in well accordance with [T.
However, the amorphous state is still observed for PLA plasticized with DPGDB and GTB after 75 days' storage, because slow crystallization does not undergo during storage period.
The thermal degradation of three plasticizers increases in a sequence: GTA (120[degrees]C)< DPGDB (192[degrees]C) < GTB (241[degrees]C), which is consistent for the thermal degradation sequence: PLA/GTA-25 (185[degrees]C)< PLA/DPGDB-25 (250[degrees]C) < PLA/GTB-25 (272[degrees]C).
It shows an upward tendency in a sequence: GTA > DPGDB > GTB.