Currently, continuous polymer fibers are usually manufactured in versatile forms such as, aramid fiber. In this study, continuous polycarbonate (PC) fiber having the uniform diameter was manufactured from a thermoplastic PC resin using a twin screw extruder. Carbon nanotubes (CNTs) were uniformly dispersed in the PC resin, using a solvent dispersion method. The effect of CNT on the mechanical properties of PC fiber was analyzed statistically, using Weibull distribution, by single PC fiber tensile test. Dynamic contact angle was measured to compare the surface energies of PC fiber and PC-CNT fiber on the water droplet. The difference in the wetting patterns was also observed by injecting a solvent between two fibers. Tensile strength and Young’s modulus of the PC fiber was significantly increased by the addition of even a small amount of CNT. This improvement can be attributed to the excellent reinforcing and stress transferring effects of the CNT filler. Composites were made of both types of PC film and PC fiber as a matrix and their impregnation properties were investigated by inspection of photographs of their cross-sections. The mechanical properties of the two-types of composites were also compared by tensile testing. From the cross-sectional fractography and the permeated PC weight, PC fiber type exhibited better impregnation property than the PC film type, and thus resulted in the improved tensile strength.

中文翻译：

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碳纤维增强聚碳酸酯（PC）膜和PC纤维浸渍的复合材料的界面和机械性能

当前，连续聚合物纤维通常以多种形式制造，例如芳族聚酰胺纤维。在这项研究中，具有均匀直径的连续聚碳酸酯（PC）纤维是使用双螺杆挤出机由热塑性PC树脂制成的。使用溶剂分散法将碳纳米管（CNT）均匀地分散在PC树脂中。通过Weibull分布，通过单根PC纤维拉伸试验，统计分析了CNT对PC纤维机械性能的影响。测量动态接触角以比较水滴上PC纤维和PC-CNT纤维的表面能。通过在两根纤维之间注入溶剂也可以观察到润湿方式的差异。即使加入少量的CNT，PC纤维的拉伸强度和杨氏模量也会显着提高。这种改善可以归因于CNT填料的优异的增强和应力转移效果。复合材料是由两种类型的PC薄膜和PC纤维作为基质制成的，并且通过检查其横截面照片来研究其浸渍性能。还通过拉伸测试比较了两种类型的复合材料的机械性能。从横截面的形貌和渗透的PC重量来看，PC纤维类型比PC膜类型表现出更好的浸渍性能，因此导致改善的拉伸强度。复合材料是由两种类型的PC薄膜和PC纤维作为基质制成的，并且通过检查其横截面照片来研究其浸渍性能。还通过拉伸测试比较了两种类型的复合材料的机械性能。从横截面的形貌和渗透的PC重量来看，PC纤维类型比PC膜类型表现出更好的浸渍性能，因此导致改善的拉伸强度。复合材料是由两种类型的PC薄膜和PC纤维作为基质制成的，并且通过检查其横截面照片来研究其浸渍性能。还通过拉伸测试比较了两种类型的复合材料的机械性能。从横截面的形貌和渗透的PC重量来看，PC纤维类型比PC膜类型表现出更好的浸渍性能，因此导致改善的拉伸强度。