玻纤/石墨/聚芳醚腈复合材料的制备与性能

Preparation and Properties of Polyarylene Ether Nitrile/Glass Fiber/Graphite Composite

以聚芳醚腈(PEN)为基体,采用双螺杆挤出机熔融共混制备了玻纤、石墨复合材料,重点研究了两种不同形貌的增强填料对PEN树脂的协同增强作用。测试了不同样品的拉伸、弯曲和冲击等力学性能,利用扫描电镜对拉伸断面进行形貌分析,并对样品进行了TGA测试和流变性能测试。结果表明,大量玻纤以棒状存在于PEN树脂当中,构成骨架结构,使得PEN树脂力学性能大幅度提高,石墨以片层形状存在于PEN树脂与玻纤之间,进一步增强了PEN树脂基体的连接作用,从而使得复合材料力学性能进一步提高;石墨在提高PEN树脂强度的同时能够提高PEN树脂的热稳定性;在相同频率下,PEN基复合材料的储能模量和耗能模量均随玻纤和石墨填料含量增加而提高,低含量的石墨填入对体系的模量和黏度影响较小。

The polyarylene ether nitritle （PEN） matrix composites filled with glass fiber and graphite were prepared by means of melt blending with twin-extruder. Studied the synergistic enhancement of two different morphologies of reinforcing filler on the PEN resin. Tested the mechanical property such as tensile strength, bending and impact sthength and other mechanical properties of different samples, using scanning electron microscopy （SEM） characterized the morphology of cross-section, and TGA tests and rheological properties test on the sample were also used. The results showed that a large number of rod-like glass existed in the PEN resin which constituted a skeleton structure, allowing mechanical properties of PEN resin greatly improved, graphite existed as lamellar shape in the PEN resin and glass, further enhanced the PEN resin matrix＇s connection function, thus improved the mechanical properties of composite; graphite raised strength and thermal stability of PEN resin. At the same frequency, the storage and energy modulus of PEN-based composites increased with the glass fiber and graphite filler content. The low content of graphite filling on the system modulus and viscosity were less affected.