Instituto Tecnológico de Materiales. Universidad Politécnica de Valencia, Camino de Vera, s/n, 46022 Valencia, Spain.
Bioresour Technol. 2012 Jun;114:622-8. doi: 10.1016/j.biortech.2012.02.128. Epub 2012 Mar 5.
The combustion process of virgin and reprocessed polylactide (PLA) was simulated by multi-rate linear non-isothermal thermogravimetric experiments under O(2). A complete methodology that accounted on the thermal stability and emission of gases was thoroughly developed. A new model, Thermal Decomposition Behavior, and novel parameters, the Zero-Decomposition Temperatures, were used to test the thermal stability of the materials under any linear heating rate. The release of gases was monitored by Evolved Gas Analysis with in-line FT-IR analysis. In addition, a kinetic analysis methodology that accounted for variable activation parameters showed that the decomposition process could be driven by the formation of bubbles in the melt. It was found that the combustion technologies for virgin PLA could be transferred for the energetic valorization of its recyclates. Combustion was pointed out as appropriate for the energetic valorization of PLA submitted to more than three successive reprocessing cycles.
采用多速率线性非等温热重实验在 O(2)下模拟了原始和再加工聚乳酸 (PLA) 的燃烧过程。彻底开发了一种完整的方法，该方法考虑了热稳定性和气体排放。使用新模型 Thermal Decomposition Behavior 和新参数 Zero-Decomposition Temperatures，在任何线性加热速率下测试材料的热稳定性。通过在线 FT-IR 分析的 Evolved Gas Analysis 监测气体的释放。此外，一种考虑了可变活化参数的动力学分析方法表明，分解过程可以由熔体中气泡的形成驱动。结果发现，原始 PLA 的燃烧技术可用于其回收物的能量增值。燃烧被指出是合适的，因为它可以用于对经过三个以上连续再加工循环的 PLA 进行能量增值。
