Poly(lactic acid) (PLA) and PLA/5% Babassu compounds were molten mixed, afterwards aged at temperatures ranging from 50 to 90 °C during 15 to 60 min. The aging effect on the phase transitions of PLA compounds was investigated using modulated differential scanning calorimetry (MDSC), through analysis of total, reversing and non-reversing heat flows. The crystallization and melting phenomena were evidenced, as well as the increase of crystalline ordering upon aging. The kinetics of cold crystallization and recrystallization during the melting event were solely elucidated using MDSC. The phase transitions were modeled using Pseudo-Avrami, which displayed good fits between the theoretical and experimental data. This work reports the influence of the composite aging on reordering and recrystallization phenomena of PLA and PLA/Babassu composite with insights of the reordering and recrystallization phenomena.

将聚乳酸 (PLA) 和 PLA/5% 巴巴苏化合物熔融混合，然后在 50 至 90 °C 的温度范围内老化 15 至 60 分钟。使用调制差示扫描量热法 (MDSC) 通过分析总热流、可逆热流和非可逆热流，研究了老化对 PLA 化合物相变的影响。证明了结晶和熔化现象，以及老化后晶体有序度的增加。熔融过程中的冷结晶和再结晶动力学仅使用 MDSC 进行了阐明。使用 Pseudo-Avrami 对相变进行建模，显示出理论数据和实验数据之间的良好拟合。