Improvement in Mechanical Properties and Heat Resistance of PLLA-b-PEG-b-PLLA by Melt Blending with PDLA-b-PEG-b-PDLA for Potential Use as High-Performance Bioplastics

Table 1

Characteristics of PLLA-PEG-PLLA and PDLA-PEG-PDLA.

PLA-PEG-PLA	[α; (deg.mL.g^−1.dm^−1)	(g/mol)	Ð	(°C)	(°C)
PLLA-PEG-PLLA	−122.3	90,000	2.8	31	171
PDLA-PEG-PDLA	+121.5	85,400	2.1	29	170

[α] (specific optical rotation) determined by polarimetry using chloroform as the solvent at 25°C with a wavelength of 589 nm [28].
(number-averaged molecular weight) and dispersity index (Ð) measured by GPC using tetrahydrofuran as the eluent at 40°C.
glass transition temperature () and melting temperature () measured by DSC (samples were melted at 200°C for 3 min and cooled to 0°C before scan from 0 to 200°C at 10°C/min under N₂ flow).