It is well known that the inadequate disposal of polymeric materials causes significant environmental problems. Recycling and the use of biodegradable polymers are among the methods used to minimize these problems. However, the low mechanical performance of the majority of biodegradable polymers hinders the direct substitution of synthetic polymers, such as polyethylene (PE), polypropylene (PP) and polystyrene (PS), by biodegradable ones. Blending synthetic and biodegradable polymers is a way to develop recyclable biodegradable products with a good set of mechanical properties. Therefore, in this work we investigate the influence of extrusion cycles on the degradation of a polypropylene/poly (butylene adipate-co-terephthalate)/thermoplastic starch blend before and after inoculation with Aspergillus sp. and Penicillium sp. fungi degradaded for 30 days. The samples were exposed to the fungi and their mass loss, chemical structure, hydrophilicity, and morphology were observed as a function of inoculation time and processing cycles. Our results indicate that thermo-mechanical degradation favors the deposition of fungi in the samples and enables changes in film morphology and hydrophilicity.

众所周知，聚合物材料的处置不当会引起严重的环境问题。回收和使用可生物降解的聚合物是减少这些问题的方法之一。然而，大多数可生物降解的聚合物的低机械性能阻碍了可生物降解的聚合物直接替代合成聚合物，例如聚乙烯（PE），聚丙烯（PP）和聚苯乙烯（PS）。混合合成和可生物降解的聚合物是开发具有良好机械性能的可回收可生物降解产品的一种方法。因此，在本工作中，我们调查挤出周期对聚丙烯/聚（亚丁基己二酸酯的降解的影响共同前和接种后-terephthalate）/热塑性淀粉共混物曲霉菌属。和青霉菌。真菌降解30天。将样品暴露于真菌，并观察其质量损失，化学结构，亲水性和形态随接种时间和加工周期的变化。我们的结果表明，热机械降解有利于真菌在样品中的沉积，并能改变膜的形态和亲水性。