The environmental-friendly poly (lactic acid) (PLA) composites were fabricated by incorporating precipitated barium sulfate (BaSO₄), and then the crystallization behaviors and rheological properties were investigated in detail. Results show that the added inorganic filler enhances the crystallization capacity, promoting the crystallization happened in advance and achieving increased crystallinity for the composites. Such promotion effect is further demonstrated by the calculated kinetic parameters including half-time of crystallization, F(T), activation energy and nucleation activity. Rheology tests reveal that pure PLA exhibits a typical linear viscoelastic feature while the shear-thinning behavior of the composites becomes manifest increasingly. However, the complex viscosity, storage modulus and loss modulus for the composites are all increased along with added inorganic filler.

通过掺入沉淀的硫酸钡（BaSO ₄），然后详细研究其结晶行为和流变性能。结果表明，添加的无机填料增强了结晶能力，促进了事先发生的结晶，并提高了复合材料的结晶度。通过计算的动力学参数进一步证明了这种促进作用，该动力学参数包括结晶时间的一半，F（T），活化能和成核活性。流变学测试表明，纯PLA表现出典型的线性粘弹性特征，而复合材料的剪切稀化行为越来越明显。然而，随着添加的无机填料，复合材料的复数粘度，储能模量和损耗模量均增加。