The effect of the addition of cassava thermoplastic starch on the general properties and the photodegradation behavior of poly(L-lactic acid) (PLLA) was evaluated by blending PLLA with TPS in different weight percentages (5, 10, 15, 20 and 25 wt%). The blends were studied through differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and mechanical properties. All the studies were performed before and after the photo-degradation in a climatic chamber. It was found that TPS was immiscible with PLLA and reduced T_g, T_m, and T_cc and influence X_c of PLLA, indicating an interaction of the TPS phase with the PLLA matrix, probably due to plasticizer migration. The tension test showed a decrease in the mechanical resistance of the blends, especially at the lowest TPS content; however, an increase in TPS lead to an increase in ductility. On the other hand, the UV degradation resistance was higher for the blends than for L₁₀₀, possibly due to the protective effect of glycerol. It was concluded that the films obtained were fully biobased and biodegradable with higher UV resistance than the PLLA and with similar ductility.

通过将PLLA和TPS以不同的重量百分比（5、10、15、20和25 wt％）共混来评估木薯热塑性淀粉的添加对聚L-乳酸（PLLA）的一般性能和光降解行为的影响％）。通过差示扫描量热法（DSC），热重分析（TGA），扫描电子显微镜（SEM）和机械性能研究了共混物。所有研究均在气候室内进行光降解之前和之后进行。发现TPS与PLLA不相容，并且降低了T _g，T _m和T _cc并影响了X _c的PLLA值，表明TPS相与PLLA基质的相互作用，可能是由于增塑剂的迁移。拉伸试验表明，共混物的机械阻力降低，尤其是在最低TPS含量下。然而，TPS的增加导致延展性的增加。另一方面，共混物的抗紫外线降解性高于L ₁₀₀，这可能是由于甘油的保护作用所致。结论是，所获得的膜是完全生物基的且可生物降解的，其抗紫外线能力比PLLA高，并且具有相似的延展性。