材料期刊网

采用滑石粉（Talc）／玻纤（GF）作为复合增强体系，通过双螺杆挤出机制备了一系列增强尼龙66（PA66）材料。研究了Tale与GF的配比对增强PA66复合材料力学性能的影响，并用扫描电镜（SEM）和差示扫描量热（DSC）方法对复合材料的微观结构、非等温结晶过程进行了研究。研究结果表明，当PA66／Talc／GF质量配比为70／5／25时Talc与GF复合增强PA66有明显的协同效应，复合材料的拉伸强度、弯曲强度以及缺1：2冲击强度都明显提高。Talc和GF对PA66具有有效的异相成核作用，其加入使得结晶度增大，结晶温度升高；Talc以及GF在PA66基体中分散均匀，GF沿Talc面取向明显，相互协同形成了特殊的三维网络结构。

Using talc/glass fiber as mixed reinforcing extruder. The effects of the, ratio of talc to glass fiber on system, reinforced PA66 was prepared by a twin-screw the mechanical properties of composites were studied. The microstructure, crystallization behaviors in cooling process were studied by means of SEM and DSC. The results demonstrate a synergy between the reinforcements at the two different types. The tensile strength, flexural strength and notched impact strength of composites effectively increase and good reinforcement for PA66 is obtained when the optimal quality ratio of PA66/talc/glass fiber is 70:5:25. Results of DSC show that the existences of talc and glass fiber, which can increase the crystallization temperature and crystallinity, have the heterogeneous nucleation effect on PA66. Most of talc and glass fiber dispersed evenly in the PA66 matrix and glass fiber oriented Obviously along the surface of talc. Because of the synergistic effects between hybrid components, a special 3-D network architecture was formed.