Cisar Jaroslav, Pummerova Martina, Drohsler Petra, Masar Milan, Sedlarik Vladimir
Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida Tomase Bati 5678, 760-01 Zlín, Czech Republic.
Polymers (Basel). 2025 May 13;17(10):1326. doi: 10.3390/polym17101326.
As a polymer degrades, its structure changes, and the course of composting also affects the rate and degree of decomposition. Moreover, the potential exists for the formation of microplastics. This work focuses on the investigation of the long-term hydrolytic degradation of PLA-based composites at different temperatures (50, 55, and 60 °C, respectively). Samples were prepared on semi-industrial equipment, simulating actual production conditions. The effect of the degradation temperature on molecular weight was studied by gel permeation chromatography. Variation in the thermal properties and crystallinity of the PLA and its composites was investigated using differential scanning calorimetry and thermal gravimetric analysis. Mass loss during hydrolytic degradation was assessed using the gravimetric technique, and confirmation of microplastic residues in the hydrolyzed samples was evaluated using Fourier-transform infrared spectroscopy.
随着聚合物降解，其结构会发生变化，堆肥过程也会影响分解速率和程度。此外，还存在形成微塑料的可能性。这项工作重点研究了不同温度（分别为50、55和60°C）下聚乳酸基复合材料的长期水解降解情况。样品在模拟实际生产条件的半工业设备上制备。通过凝胶渗透色谱法研究了降解温度对分子量的影响。使用差示扫描量热法和热重分析研究了聚乳酸及其复合材料的热性能和结晶度变化。采用重量法评估水解降解过程中的质量损失，并使用傅里叶变换红外光谱法评估水解样品中微塑料残留物的确认情况。
