Heat Treatment Effects on the Mechanical Properties and Morphologies of Poly (Lactic Acid)/Poly (Butylene Adipate-co-terephthalate) Blends

Table 2

Characteristic temperatures of phase transition and enthalpy values of PLA/PBAT blends in the melt-quenched scan of DSC.

Code	𝑇𝑔-PBAT^1	𝑇𝑔-PLA^2	Δ𝑇𝑔^3	Δ𝐻cc^4 (J/g)	𝑇𝑚-PLA^5 (°C)	Δ𝐻𝑚-PLA^5 (J/g)
PLA	—	59.2	—	−21.31	164.3	37.2
PLA/PBAT (70/30)	−33.6	60.1	93.4	−17.59	164.9	22.29
PLA/PBAT (50/50)	−32.9	59.5	92.4	−10.41	165.3	14.36
PLA/PBAT (30/70)	−30.1	57.2	87.3	−6.84	165.2	9.65
PBAT	−35.1	—	—	—	—	—

¹𝑇_𝑔-PBAT: The temperature of glass transition region of PBAT.
²𝑇_𝑔-PLA: The temperature of glass transition region of PLA.
³Δ𝑇_𝑔: Δ𝑇_𝑔=𝑇_𝑔-PLA−𝑇_𝑔-PBAT.
⁴Δ𝐻_cc: The exothermal enthalpy of PLA cold-crystallization (re-crystallization).
⁵𝑇_𝑚-PLA and Δ𝐻_𝑚-PLA: The melting temperature and crystal melting enthalpy of PLA.