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

Table 1

Characteristic temperatures of phase transition and enthalpy values of PLA/PBAT blends in the initial 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	—	60.7	—	−17.39	164.1	37
PLA/PBAT (70/30)	−32.1	59.7	91.8	−13.71	164.3	22.38
PLA/PBAT (50/50)	−32.8	59.2	91.0	−7.39	163.9	16.58
PLA/PBAT (30/70)	−30.9	57.6	88.5	−3.61	163.7	9.91
PBAT	−34	—	—

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.