采用熔融共混与模压成型工艺制备了磨碎玻璃纤维（MGF）／聚乳酸（PLA）复合材料，考察了MGF的含量对复合材料的微观形貌、力学性能和熔体流动速率的影响。结果表明：经过硅烷偶联剂表面包覆改性的MGF在基体中分散均匀，且与PLA之间具有较好的界面结合；随着MGF含量的增加，MGF／PLA复合材料的拉伸强度下降，弹性模量持续上升，而断裂伸长率先增大后减小；MGF总体上提高了复合材料系的硬度，但却大幅降低了其熔体流动速率。
The composites of poly lactic acid (PLA) filled with milled glass fibers (MGF) were prepared via molten blending and compression molding. The effects of MGF contents on the morphology, mechanical properties and melt flow rate of MGF/PLA composites were investigated. The results show that well dispersed MGF were coated by silane coupling agent in matrix, and improved interracial adhesion between the PLA and MGF was observed. With the increase of MGF, the tensile strength was decreased, and the Young's modulus exhibited the trend of continuous increase. However, the elongation at break of MGF/PLA composites was increased first and then declined. The MGF led to positive influence on the hardness, but brought on a remarkable negative impact on the melt flow rate of MGF/PLA composites.
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